我正试图找出我的checkQuestion函数出了什么问题。我不知道为什么，但有时它不会检查某些问题或完全跳过它们。我创建了一个函数createQuestion，我在checkQuestion中调用了createQuestion，所以我不知道是什么导致一切都搞砸了。任何帮助将不胜感激，我只需要一些关于错误的线索。如果你想运行它，我发布了该程序的链接。
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main(void) {
srand(time(NULL));
printf("Math quiz. \n");
printf("This is level 1. There are a total of 10 questions. \n\n");
createQuestion();
checkQuestion();
}
//Functions
int integers(void) {
int digit;
digit = rand() % 10;
return digit;
}
char operations(void) {
int digit;
digit = rand() % 4;
if (digit == 0) {
return '+';
} else if (digit == 1) {
return '-';
} else if (digit == 2) {
return '*';
} else if (digit == 3) {
return '/';
}
}
int createQuestion(void) {
int i;
int count = 0;
int answer;
int sum;
for (i = 1; i <= 10; i++) {
count++;
printf("%d)%d", count, integers());
printf("%c", operations());
printf("%d", integers());
printf("=");
scanf("%f", & answer);
checkQuestion(integers(), integers(), operations(), answer);
}
}
void checkQuestion(float a, float b, float c, char d) { //a integer b integer c answer //d operator
int answer1;
int answer2;
int answer3;
int answer4;
if (operations() == '+') {
answer1 == a + b;
answer1 == c;
if (answer1 == c) {
return messagesGood();
} else {
return messagesBad();
}
} else if (operations() == '-') {
answer2 = a - b;
if (answer2 == c) {
return messagesGood();
} else {
return messagesBad();
}
} else if (operations() == '*') {
answer3 = a * b;
if (answer3 == c) {
return messagesGood();
} else {
return messagesBad();
}
} else if (operations() == '/') {
answer4 = a * b;
if (answer4 == c) {
return messagesGood();
} else {
return messagesBad();
}
}
}
void messagesGood(void) {
int digit;
digit = rand() % 4;
switch (digit) {
case 0:
printf("Very good! \n");
break;
case 1:
printf("Excellent! \n");
break;
case 2:
printf("Nice Work! \n");
break;
case 3:
printf("Keep up the good work! \n");
break;
}
}
void messagesBad(void) {
int digit;
digit = rand() % 4;
switch (digit) {
case 0:
printf("No. Please try again. \n");
break;
case 1:
printf("Wrong. Try once more. \n");
break;
case 2:
printf("Don’t give up! \n");
break;
case 3:
printf("No. Keep trying. \n");
break;
}
}
答案 0 :(得分：1)
每次拨打operations时，您都会得到不同的结果。您需要在条件中与d进行比较，而不是与operator进行比较。您在createQuestion中遇到了类似的问题，其中传递给checkQuestion的内容可能不是向用户显示的内容。
例如：
if (d == '+') {
// ...
}
答案 1 :(得分：0)
一个奇怪的是，你有一个返回char的函数：
**char** operations(void){
etc...
}
然后你把它放在一个期望浮动的函数中：
checkQuestion(integers(), integers(), **operations()**, answer);
void checkQuestion(float a, float b, **float c**, char d)