#include
float qiuhe(float, float) // 改为float qiuhe(float, float);
int main()
{
float x,y,result;
printf("Please two num:\n");
scanf("%f%f",&x,&y);
printf("input num two:");
result = sum; //sum不知道从哪里出来的,改为result=qiuhe(x,y);
printf("result=%.2f\n",result);
return 0;
}
void qiuhe(float a, float b) //返回值不是void 是float
{
float sum;
sum = a*a*a+b*b*b;
return sum;
}
result = sum;修改为 result = qiuhe(x,y);