Question

C语言if语句？

#include<stdio.h>
int main()
{
int x,y;
printf("enter x:");
scanf("%d",&x);
y=0;
if(x>=0)
if(x>0)
y=1;
else
y=-1;
printf("x=%d,y=%d\n",x,y);
return 0;

}
当x<0时y不应该等于-1吗，为什么我运行时y=0呀

Answer 1

应该这样修改：
#include<stdio.h>
int main()
{
int x,y;
printf("enter x:");
scanf("%d",&x);
y=0;
if(x!=0)
if(x>0)
y=1;
else
y=-1;
printf("x=%d,y=%d\n",x,y);
return 0;
}

Answer 2

#include<stdio.h>
int main()
{
int x,y;
printf("enter x:");
scanf("%d",&x);
y=0;
/*
if(x>=0)
{
if(x>0)
y=1;
else
y=-1;
}
*/
if(x>=0)
{
if(x>0)
y=1;

}
else
y=-1;

printf("x=%d,y=%d\n",x,y);
return 0;

}