关于scanf()的输入模式-加不加 “,”

#include<stdio.h>
//#include<iostream>
//using namespace std;
int a=0;
int b=0;
int c=0;
int max(int x,int y)
{
    int z;
    if(x>y) z=x;
    else z=y;
    return(z);
}
int main(void)
{
    while(1)
    {
        scanf("%d, %d",&a,&b);
        c=max(a,b);
        //prinf()
        printf("max is %d\n",c);
        if(a==100)
            break;
    }

    /* while(1)
    {
        cin >> a >> b;
        c=max(a,b);
        //prinf()
       cout << c;
        if(a==100)
            break;
    }*/
    return 0;
}

 输入形式 3,2

#include<stdio.h>
//#include<iostream>
//using namespace std;
int a=0;
int b=0;
int c=0;
int max(int x,int y)
{
    int z;
    if(x>y) z=x;
    else z=y;
    return(z);
}
int main(void)
{
    while(1)
    {
        scanf("%d %d",&a,&b);
        c=max(a,b);
        //prinf()
        printf("max is %d\n",c);
        if(a==100)
            break;
    }

    /* while(1)
    {
        cin >> a >> b;
        c=max(a,b);
        //prinf()
       cout << c;
        if(a==100)
            break;
    }*/
    return 0;
}

 输入形式 3 2

#include<stdio.h>
//#include<iostream>
//using namespace std;
int a=0;
int b=0;
int c=0;
int max(int x,int y)
{
    int z;
    if(x>y) z=x;
    else z=y;
    return(z);
}
int main(void)
{
    while(1)
    {
        scanf("%d%d",&a,&b);
        c=max(a,b);
        //prinf()
        printf("max is %d\n",c);
        if(a==100)
            break;
    }

    /* while(1)
    {
        cin >> a >> b;
        c=max(a,b);
        //prinf()
       cout << c;
        if(a==100)
            break;
    }*/
    return 0;
}