大家帮帮忙~ C程序 输入x和y,编写程序求z=x+|y|的值

#include<stdio.h>
main()
{
float x,y,z;
printf("input x y\n");
scanf("%f %f",&x,&y);
if(y<0)
y *= -1;
z=x+y;
printf("z=%f\n",z);
}

#include <stdio.h>
main()
{
int x,y,z;
scanf("%d%d,&x,&y);
z=x+!y;
printf("%d",z);
getchar();
getchar();
getchar();
getchar();
}

MS是这样的..错了表怪我..我也没学多久...

#include "stdio.h"
void main()
{
int z,x,y;
printf("please input x&y:\n");
scanf("d%d%",&x,&y);
z=x+y;
printf("d%",z);

}