在编译期间，它不要求用户输入速率和时间

Question

// Q. Find out the simple interest. 

#include <stdio.h>
#include <math.h>
int main()
{
int principal, rate, time;
printf("principaln");
scanf("% d", &principal);
printf("raten");
scanf("% d", &rate);
printf("timen");
scanf("% d", &time);
printf("Simple interest is %d", principal * rate * time / 100);
return 0;
}

Answer 1

要使scanf正常工作，您需要删除格式字符串中%和d之间的空格:% d.

#include <stdio.h>
#include <math.h>
int main()
{
int principal, rate, time;
printf("principaln");
scanf("%d", &principal);
printf("raten");
scanf("%d", &rate);
printf("timen");
scanf("%d", &time);
printf("Simple interest is %d", principal * rate * time / 100);
return 0;
}

同样，程序不能在编译期间请求输入。它只会在运行时请求输入。