python - 转换 C++ for 循环 python

Question

尝试搜索类似的问题，但无法解决这个问题。不确定如何正确转换 C++ 循环中的某些功能。尤其是count < 20状况main() 。

原问题:https://rosettacode.org/wiki/Anti-primes

#include <iostream>

int countDivisors(int n) {
    if (n < 2) return 1;
    int count = 2; // 1 and n
    for (int i = 2; i <= n/2; ++i) {
        if (n%i == 0) ++count;
    }
    return count;
}

int main() {
    int maxDiv = 0, count = 0;
    std::cout << "The first 20 anti-primes are:" << std::endl;
    for (int n = 1; count < 20; ++n) {
        int d = countDivisors(n);
        if (d > maxDiv) {
            std::cout << n << " ";
            maxDiv = d;
            count++;
        }
    }
    std::cout << std::endl;
    return 0;
}

我尝试的解决方案:

def countDivisors(n):
    if (n < 2):
        return 1
    count = 2

    for i in range(2, int(n/2)-1, 1):
        print(i)    
        if(n%i == 0):
            count = count + 1
    return count

def main():
    print("The first 20 anti-primes are: ")
    n = 1
    while count < 20:    
        d = countDivisors(n)
        if(d > maxDiv):
            print(n)
            maxDiv = d
            count += 1
            n += 1
    return 0

必填答案:

1 2 4 6 12 24 36 48 60 120 180 240 360 720 840 1260 1680 2520 5040 7560 

Answer 1

严格来说两者for循环:

for (int i = 2; i <= n/2; ++i)

会变成

for i in range(2,int(n/2)+1):

int(n/2)-1在你的代码中将是 i < n/2-1在C.

<小时/> 20个，

int maxDiv = 0, count = 0;    // <-- !
for (int n = 1; count < 20; ++n) {
    int d = countDivisors(n);
    if (d > maxDiv) {
        std::cout << n << " ";
        maxDiv = d;
        count++;
    }

就快到了，只是你没有maxDiv和count在 Python 中初始化。

maxDiv = 0  # <-- !
count = 0   # <-- !
n = 1
while count < 20:    
    d = countDivisors(n)
    if(d > maxDiv):
        print(n)
        maxDiv = d
        count += 1
    n += 1