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#include <stdio.h>
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#include <math.h>
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#define PI 3.14159265358979323846
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//两数相加
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int add(int n,int m) {
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return n + m;
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}
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//两数相减
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int subtract(int n,int m) {
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return n - m;
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}
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//两数相乘
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int multiply(int n,int m) {
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return n * m;
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}
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//两数相除
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double divide(int n,int m) {
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if (m == 0){
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printf("Error!\n");
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return 0;
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}
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else {
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return (double)n/m;
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}
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}
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//求模运算
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int modulo(int n,int m) {
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if (m == 0) {
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printf("Error\n");
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return 0;
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}
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else {
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return n % m;
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}
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}
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//求n的阶乘
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long long factorial(int n){
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if(n == 0 || n == 1){
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return n;
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}
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else return n * factorial(n - 1);
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}
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//判断n是否为素数
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int prime(int n){
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int i ,j = 1;
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if(n == 1 || n == 0){
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j = 0;
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}
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else {
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for(i = 2;i < n;i++){
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if(n % i == 0){
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j=0;
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break;
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}
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}
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}
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return j;
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}
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//求半径为n的球的体积
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double volume(int n){
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if(n < 0){
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printf("Error!\n");
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return 0;
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}
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else {
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return 4.0 / 3.0 * PI * n * n * n;
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}
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}
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//求斐波那契数列的第n项值
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long long int function(int n){
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if(n <= 0){
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printf("Error!\n");
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return 0;
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}
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else if(n == 1||n == 2){
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return 1;
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}
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else {
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return function(n-2)+function(n-1);
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}
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}
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//求x的n次方
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long long int power(int n,int m){
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if(m == 0){
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return 1;
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}
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else if(m == 1){
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return n;
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}
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else {
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return n * power(n,m-1);
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}
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}
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//求两个数的最大公约数
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int GCD(int n,int m){
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if(m == 0){
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return n;
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}
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else{
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return GCD(m,n%m);
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}
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}
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//求两个数的最小公倍数
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long long int LCM(int n,int m){
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int s=GCD(n,m);
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if(n == 0||m == 0){
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return 0;
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}
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else{
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return n * m / s;
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}
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}
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//交换两个数
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void exchange(int *n,int *m){
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int t;
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t = *n;
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*n = *m;
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*m = t;
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}
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//对输入的n个数排序
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//从小到大排序
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void minsort(int a[],int n){
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int i,j,t,min;
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for(i = 0;i < n;i++){
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min = i;
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for(j = i;j<n;j++){
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if(a[j] < a[min]) min = j;
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}
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if(min != i){
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t = a[min];
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a[min] = a[i];
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a[i] = t;
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}
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}
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}
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//从大到小排序
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void maxsort(int a[],int n){
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int i,j,t,max;
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for(i = 0;i < n;i++){
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max = i;
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for(j = i;j<n;j++){
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if(a[j] > a[max]) max=j;
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}
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if(max != i){
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t = a[max];
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a[max] = a[i];
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a[i] = t;
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}
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}
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}
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int main() {
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int num1, num2, choice;
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double result;
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while (1) { // 无限循环直到用户选择退出
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printf("\n--------菜单--------\n");
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printf("1. 两数相加\n");
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printf("2. 两数相减\n");
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printf("3. 两数相乘\n");
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printf("4. 两数相除\n");
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printf("5. 求模运算\n");
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printf("6. 求n的阶乘\n");
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printf("7. 判断n是否为素数\n");
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printf("8. 求半径为n的球的体积\n");
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printf("9. 求斐波那契数列的第n项值\n");
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printf("10. 求x的n次方\n");
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printf("11. 求两个数的最大公约数\n");
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printf("12. 求两个数的最小公倍数\n");
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printf("13. 交换两个数\n");
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printf("14. 对输入的n个数排序\n");
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printf("0. 退出程序\n");
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printf("----------------------\n");
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printf("请输入你的选择：");
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scanf("%d", &choice);
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switch (choice) {
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case 0: // 退出程序
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printf("感谢使用本程序，再见！\n");
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return 0;
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case 1: // 两数相加
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printf("请输入两个数：");
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scanf("%d %d", &num1, &num2);
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result = add(num1, num2);
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printf("%lf",result);
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break;
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case 2: // 两数相减
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printf("请输入两个数：");
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scanf("%d %d", &num1, &num2);
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result = (double)subtract(num1, num2);
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printf("%lf",result);
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break;
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case 3: // 两数相乘
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printf("请输入两个数：");
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scanf("%d %d", &num1, &num2);
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result = multiply(num1, num2);
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printf("%lf",result);
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break;
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case 4: // 两数相除
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printf("请输入两个数：");
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scanf("%d %d", &num1, &num2);
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result = divide(num1, num2);
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printf("%lf",result);
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break;
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case 5: // 求模运算
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printf("请输入两个数：");
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scanf("%d%d", &num1, &num2);
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result = modulo(num1, num2);
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printf("%lf",result);
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break;
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case 6://求n的阶乘
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printf("请输入一个数：");
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scanf("%d",&num1);
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result = factorial(num1);
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printf("%lf",result);
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break;
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case 7://判断n是否为素数
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printf("请输入一个数：");
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scanf("%d",&num1);
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result = prime(num1);
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if(result == 1){
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printf("%d是素数",num1);
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}
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else {
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printf("%d不是素数",num1);
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}
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break;
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case 8://求半径为n的球的体积
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printf("请输入一个数：");
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scanf("%d",&num1);
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result = volume(num1);
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printf("%lf",result);
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break;
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case 9://求斐波那契数列的第n项值
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printf("请输入一个数：");
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scanf("%d",&num1);
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result = function(num1);
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printf("%lf",result);
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break;
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case 10://求x的n次方
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printf("请输入两个数：");
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scanf("%d %d", &num1, &num2);
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result = power(num1,num2);
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printf("%lf",result);
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break;
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case 11://求两个数的最大公约数
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printf("请输入两个数：");
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scanf("%d %d", &num1, &num2);
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result = GCD(num1,num2);
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printf("%lf",result);
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break;
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case 12://求两个数的最小公倍数
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printf("请输入两个数：");
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scanf("%d %d", &num1, &num2);
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result = LCM(num1,num2);
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printf("%lf",result);
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break;
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case 13://交换两个数
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printf("请输入两个数：");
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scanf("%d %d", &num1, &num2);
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exchange(&num1,&num2);
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printf("%d %d", num1, num2);
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case 14://对输入的n个数排序
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printf("请输入需要排序的数字的个数：");
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scanf("%d",&num1);
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int a[num1];
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printf("请输入%d个数：",num1);
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for(int i = 0;i < num1;i++){
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scanf("%d",&a[i]);
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}
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minsort(a,num1);
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printf("从小到大排序；\n");
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for(int i = 0;i < num1;i++){
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printf("%d ",a[i]);
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}
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printf("\n");
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maxsort(a,num1);
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printf("从大到小排序；\n");
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for(int i = 0;i < num1;i++){
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printf("%d ",a[i]);
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}
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}
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}
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}
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