#include
main()
{
int a[4][4]={{11,12,13,14},{21,22,23,24},{31,32,33,34},{41,42,43,44}};
int n,i,j,k;
while(1){
printf("n = ");
scanf("%d",&n);
k=0;
for(i=0;i<4;i++)
for(j=0;j<4;j++)
if(a[i][j]==n){
k=1;
break;
break;
}
if(k)
printf("YES\n");
else
printf("NO\n");
}
}
如图所示,望采纳。。。。。。