为什么积，商，余数不正确？

Question

#include<stdio.h>
#include<math.h>
int main()
{
double num1, num2;
printf("输入两个正整数：\n");
scanf("%d%d",&num1,&num2);
printf("和为：%d\n ", num1+num2);
printf("差为：%d\n",num1-num2);
printf("积为%d\n",num1 *num2);
printf("整数商为：%d\n",num1 / num2);
printf("余数为：%d\n", "%f\n");
printf("average为:%d\n",(num1+num2)/2,fmod(num1,num2));

return 0;

}

Answer 1

double 要用%lf接收，后边输出也是，计算结果是小数的话就不能用%d输出

#include<stdio.h>
#include<math.h>
int main()
{
double num1, num2;
printf("输入两个正整数：\n");
scanf("%lf%lf",&num1,&num2);
printf("和为：%f\n ", num1+num2);
printf("差为：%f\n",num1-num2);
printf("积为%f\n",num1 *num2);
printf("整数商为：%f\n",num1/ num2);
printf("余数为：%f\n",  fmod(num1,num2));
printf("average为:%f\n",(num1+num2)/2);
return 0;
}