编辑代码

#include<stdio.h>
double sum(int x,int y);

int main()
{
    int x=0;
    int y=0;
    double z;
        z=sum(x,y);
    printf("z=%f\n",z);
    return 0;
}

double sum(int x,int y)
{
    double z=(x+y);
    return z;
}