#include <stdio.h>
int sqrt01(int x);
void main(void)
{
int x=49,y;
y=sqrt01(x);
if(y<0)
printf("Error:sqrt return %d\n",y);
else
printf("The sqrt root of %d is %d\n",x,y);
}
int sqrt01(int x)
{
int temp=x/2;
while(temp--)
{
if(temp*temp==x)
return temp;
}
return -1;
}