如何打这个程序啊，不会

#include<stdio.h>
int main() {
    double x,y,z;
    scanf("%lf %lf",&x,&y);
    if(x>=0&&y>0){
        z=(x*x+1)/(x*x+2)*y;
    }else if(x>0&&y<=0){
        z=(x-2)/(y*y+1);
    }else if(x<0){
        z=x+y;
    }
    printf("%lf",z);
    return 0;
}

 有帮助请采纳

#include <stdio.h>
#include <stdlib.h>



int main() {

    int x,y;
    double z;
    scanf("%d,%d",&x,&y);

    if(x>=0 && y>0) {
        z=((float)(x*x+1)/(x*x+2))*y;
    } else if(x>0 &&y<=0) {
        z=(float)(x-2)/(y*y+1);
    } else if(x<0) {
        z=x+y;
    }
    printf("z=%f",z);
    return 0;
}