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110 lines
4.3 KiB
110 lines
4.3 KiB
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define MAX_LEN 10 // 字符串最大长度
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#define STU_NUM 30 // 最多的学生人数
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#define COURSE_NUM 6 // 最多的考试科目数
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typedef struct student
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{
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long num; // 每个学生的学号
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char name[MAX_LEN]; // 每个学生的姓名
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float score[COURSE_NUM]; // 每个学生COURSE_NUM门功课的成绩
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float sum; // 每个学生的总成绩
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float aver; // 每个学生的平均成绩
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}STU;
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int Menu(void);
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void ReadScore(STU stu[], int n, int m);
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void AverSumofEveryStudent(STU stu[], int n, int m);
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void AverSumofEveryCourse(STU stu[], int n, int m);
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void SortbyScore(STU stu[],int n,int m,int (*compare)(float a,float b));
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int Ascending(float a, float b);
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int Descending(float a, float b);
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void SwapFloat(float *x, float *y);
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void SwapLong(long *x, long *y);
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void SwapChar(char x[], char y[]);
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void AsSortbyNum(STU stu[], int n, int m);
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void SortbyName(STU stu[], int n, int m);
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void SearchbyNum(STU stu[], int n, int m);
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void SearchbyName(STU stu[], int n, int m);
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void StatisticAnalysis(STU stu[], int n, int m);
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void PrintScore(STU stu[], int n, int m);
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void WritetoFile(STU record[], int n, int m);
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void ReadfromFile(STU record[], int *n, int *m);
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int main(void)
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{
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char ch;
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int n = 0, m = 0;
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STU stu[STU_NUM];
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printf("Input student number(n<%d):", STU_NUM);
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scanf("%d", &n);
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printf("Input course number(m<=%d):",COURSE_NUM);
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scanf("%d", &m);
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while (1)
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{
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ch = Menu(); // 显示菜单，并读取用户输入
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switch (ch)
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{
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case 1:ReadScore(stu, n, m);
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break;
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case 2: AverSumofEveryCourse(stu, n, m);
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break;
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case 3: AverSumofEveryStudent(stu, n, m);
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break;
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case 4: SortbyScore(stu, n, m, Descending);
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printf("\nSort in descending order by score:\n");
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PrintScore(stu, n, m);
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break;
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case 5: SortbyScore(stu, n, m, Ascending);
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printf("\nSort in ascending order by score:\n");
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PrintScore(stu, n, m);
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break;
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case 6: AsSortbyNum(stu, n, m);
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printf("\nSort in ascending order by number:\n");
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PrintScore(stu, n, m);
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break;
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case 7: SortbyName(stu, n, m);
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printf("\nSort in dictionary order by name:\n");
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PrintScore(stu, n, m);
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break;
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case 8: SearchbyNum(stu, n, m);
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break;
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case 9: SearchbyName(stu, n, m);
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break;
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case 10: StatisticAnalysis(stu, n, m);
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break;
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case 11:PrintScore(stu, n, m);
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break;
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case 12:WritetoFile(stu, n, m);
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break;
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case 13:ReadfromFile(stu, &n, &m);
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break;
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case 0: printf("End of program!");
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exit(0);
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default:printf("Input error!");
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}
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}
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return 0;}
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// 函数功能：显示菜单并获得用户键盘输入的选项
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int Menu(void)
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{
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int itemSelected;
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printf("Management for Students' scores\n");
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printf("1.Input record\n");
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printf("2.Calculate total and average score of every course\n");
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printf("3.Calculate total and average score of every student\n");
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printf("4.Sort in descending order by score\n");
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printf("5.Sort in ascending order by score\n");
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printf("6.Sort in ascending order by number\n");
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printf("7.Sort in dictionary order by name\n");
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printf("8.Search by number\n");
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printf("9.Search by name\n");
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printf("10.Statistic analysis\n");
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printf("11.List record\n");
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printf("12.Write to a file\n");
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printf("13.Read from a file\n");
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printf("0.Exit\n");
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printf("Please Input your choice:");
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scanf("%d", &itemSelected); // 读入用户输入
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return itemSelected;
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}
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