题目：输入两个正整数m和n，求其最大公约数和最小公倍数。
我输入75  35 结果是3 和75  为什么?

# include <stdio.h>

main ()
{
    int a, b, num1, num2,temp;
   
    printf("please input two numbers: \n");
   
    scanf("%d ,%d", &num1, num2);
   
    if (num1<num2)
    {
        temp = num1;
        num1 = num2;
        num2 = temp;
    }
   
    a = num1;
    b = num2;
   
    while(b != 0)
    {
        temp = a%b;
        a = b;
        b = temp;
    }
    printf ("gongyueshu:%d \n", a);
    printf ("goneyueshu:%d \n", num1*num2 / a);
    getchar ();
    return 0;
}