c++ - 为什么这个 while 循环不起作用？

Question

好的，所以我正在尝试使用 while 循环创建一个程序来查找两个数的最大公约数。这就是我想出的。但是，据我所知，当我运行该程序时，该程序似乎完全跳过了循环。 (操作数保持为 0，除数总是返回等于 num1)。那里有人可以帮助新手吗？

/* Define variables for divisors and number of operations */

int num1, num2, divisor, opers;
opers = 0;

/* Prompt user for integers and accept input */

cout << "Please enter two integers with the smaller number first, separated by a space. ";
cout << endl;
cin >> num1 >> num2;

/* Make divisor the smaller of the two numbers */

divisor = num1;

/* While loop to calculate greatest common divisor and number of calculations */

while ( (num1 % divisor != 0 ) && ( num2 % divisor != 0 ) )
{

   divisor--;
   opers++;
}

/* Output results and number of calculations performed */

cout << "The greatest common divisor of " << num1 << " and " << num2 << " is: ";
cout << divisor << endl << "Number of operations performed: " << opers;

Answer 1

一旦其中一个模数返回非 0，while 循环就会终止。 (因此，如果您的任何输入立即导致模数为 0，则不会进入循环)

你可能想要的:

while ( (num1 % divisor != 0 ) || ( num2 % divisor != 0 ) )
{

   divisor--;
   opers++;
}

这将继续循环，直到两个模运算的结果均为 0。