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#include <stdio.h>
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#include<stdlib.h>
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#include<time.h>
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struct Student
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{
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char cSchool[15];
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char cGrade[15];
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char cName[15];
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};
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int test();
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int checknum(int a,int b);
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int checkresult(int x); /*函数说明*/
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int a=-1,b,c,x;
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int k=0,grade; /*定义所需要的参数*/
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int main()
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{
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struct Student student1;
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printf("****预祝测试顺利****\n\n");
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printf("学校:");
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scanf("%s",&student1.cSchool);
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printf("年级:");
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scanf("%s",&student1.cGrade);
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printf("姓名:");
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scanf("%s",&student1.cName);
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printf("\n");
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printf("请回答下面十道题目\n");
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do{
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int i=test();
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if(i==-1)
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{
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if(grade>=90)
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printf("-------SMART");
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else if(grade>=80&&grade<90)
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printf("-------GOOD");
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else if(grade>=70&&grade<80)
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printf("-------OK");
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else if(grade>=60&&grade<70)
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printf("-------PASS");
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else
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printf("-------TRY AGAIN");
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break;
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}
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else if(checkresult(i)==0){
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a=-1;
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}
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}while(k);
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return 0;
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}
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int test()
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{
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srand((unsigned int)time(NULL));
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while(checknum(a,b)==0) /*若返回0，则重新取值；若返回1，则完成a,b取值*/
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{
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a=rand()%51; /*a取值范围0~50*/
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b=rand()%51; /*b取值范围0~50*/
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c=rand()%2; /*c取值范围0~1*/
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}
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k++; /*k表示第几题*/
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if(k==11)
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{
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printf("\n所有题目已答完，你的成绩：%d分",grade);
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return -1;
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}
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else if(c==0)
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{
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printf("第%d题:%d+%d=",k,a,b);
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return a+b;
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}
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else if(c==1)
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{
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printf("第%d题:%d-%d=",k,a,b);
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return a-b;
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}
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return -1;
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}
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int checknum(int a,int b) /*检查相加或相减的两个数是否满足要求*/
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{
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if(a>50||b>50||a<0||b<0||(a+b)>50||(a-b)<0)
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return 0;
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else
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return 1;
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}
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int checkresult(int result)
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{
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int i;
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for(i=1;i<4;i++)
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{
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scanf("%d", &x);
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if (x!=result)
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{
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if (i==3)
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{
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if (c==0){
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printf("三次回答错误，正确答案是%d\n",a+b);
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}
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else {
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printf("三次回答错误，正确答案是%d\n",a-b);
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}
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return 0;
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}
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printf("回答错误,请再次输入：");
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}
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else{
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switch(i){
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case 1:grade+=10;
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break;
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case 2:grade+=7;
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break;
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case 3:grade+=5;
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break;
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default:grade+=0;
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break;
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}
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return 0;
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}
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}
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return 0;
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}
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