# include <stdio.h>
int main()
{
    int a,b,c,max;
    printf ("please input a,b,c: \n");
    scanf ("%d,%d,%d",&a,&b,&c);
    max = a;
    if (max<b)
        max = b;
    if (max<c)
        max = c;
    printf ("The largest number is %d\n",max);
    return 0;
}
求最大值，结果显示a值，哪里有错？百思不得姐