C语言实验——鸡兔同笼

#include <stdio.h>int main (){    int m,n,x,y;    scanf ("%d %d",&m,&n);    if (n%2==1)    {               printf ("Error!");               return 0;    }    x=(4*m-n)/2;    y=(n-2*m)/2;    if ((x>=0)&&(y>=0))    printf ("%d %d",x,y);    else    printf ("error!");    return 0;}