if嵌套+break选择句式(夹带循环私货)

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int main()
{
    int n;
    printf("请输入您的充值额度:");
    scanf("%d", &n);
    if (n < 1)
    {
        printf("请充值后游玩");
        return 0;
    }
    if (n >= 1)
    {
        if (n >= 1 && n <= 99)
        {
            printf("您是尊贵的VIP1");
        }
        else if (n >= 100 && n <= 499)
        {
            printf("您是尊贵的VIP2");
        }
        else if (n >= 500 && n <= 999)
        {
            printf("您是尊贵的VIP3");
        }
        else if (n >= 1000 && n <= 1999)
        {
            printf("您是尊贵的VIP4");
        }
        else
        {
            printf("感谢养服");
        }
    }
    return 0;
}
#include <stdio.h>

int main()
{
    int n;
    printf("请输入分数:");
    scanf("%d", &n);
    if (n < 0 || n > 100)
    {
        printf("有趣");
        return 0;
    }
    if (n >= 0 && n <= 100)
    {
        if (n <= 59)
        {
            printf("您是D");
        }
        else if ( n <= 69)
        {
            printf("您是C");
        }
        else if (n <= 84)
        {
            printf("您是B");
        }
        else
        {
            printf("您是A");
        }
    }
    return 0;
}#include <stdio.h>

int main()
{
    int n;
    do{
    printf("\nEnter a number:\n");
    scanf("%d", &n);
    switch (n % 7)
    {
    case 1:
        printf("monday\n");
        /* code */
        break;
    case 2:
        printf("tuesday\n");

        break;
    case 3:
        printf("wednesday\n");

        break;
    case 4:
        printf("thursday\n");

        break;
    case 5:
        printf("friday\n");

        break;
    case 6:
        printf("saturday\n");

        break;

    default:
        printf("sunday\n");
        break;
    }
} while (n != 0);

}