在数学中,最大公约数(GCD)是最大可能的整数,该整数将两个整数相除。条件是数字必须为非零。
我们将遵循欧几里得算法来找到两个数字的GCD。
Input: Two numbers 51 and 34 Output: The GCD is: 17
findGCD(a, b)
输入:两个数字a和b。
输出: a和b的GCD。
Begin if a = 0 OR b = 0, then return 0 if a = b, then return b if a > b, then return findGCD(a-b, b) else return findGCD(a, b-a) End
#include<iostream> using namespace std; int findGCD(int a, int b) { //assume a is greater than b if(a == 0 || b == 0) return 0; //as a and b are 0, the greatest divisior is also 0 if(a==b) return b; //when both numbers are same if(a>b) return findGCD(a-b, b); else return findGCD(a, b-a); } int main() { int a, b; cout << "Enter Two numbers to find GCD: "; cin >> a >> b; cout << "The GCD is: " << findGCD(a,b); }
输出结果
Enter Two numbers to find GCD: 51 34 The GCD is: 17