打卡学习

int main()
{
    int n = 1;
    int m = 2;
    switch (n)
    {
    case 1:m++;
    case 2:n++;
    case 3:
        switch (n)
        {
        case 1:n++;
        case 2:m++; n++;
            break;
        }
    case 4:m++;
    }
    printf("m = %d,n = %d\n", m, n);
    return 0;
}