（使用if-else述句）对多个变数求最大值的练习

#include <stdio.h>
int main()
{
    int a,b,c,max;
    printf("Please enter three integers: ");
    scanf("%d%d%d",&a,&b,&c);
    if (a >= b && a >= c)
    {
        max = a;
    }else if (b >= a && b >= c)
    {
        max = b;
    } else {
        max = c;
    }
    printf("The maximum ids %d.", max);
    return 0;
}

switch (整数值)  {
    case 常数整数值:
         程式片段;
         break;
    default:
         程式片段;
         break;

}

#include <stdio.h>
int main()
{
    int id;
    printf("ID: ");
    scanf("%d",&id);
    switch (id)
    {
    case 2:
        printf("John\n");
        break;
    case 13:
        printf("Mary\n");
        break;
    default:
        printf("Not found\n");
        break;
    }
    return 0;


}