While循环条件设置及子女数量频率统计问题排查求助

编写模拟“生育子女直到同时拥有至少一个男孩和一个女孩”的程序时，先后遇到了这些问题：

• 初始阶段While循环无法正常执行，所有频率统计结果全为0
• 修复循环问题后，无法确定正确的循环终止条件，以实现“直到儿女双全才停止”的逻辑
• 调整循环条件后，又出现了列表索引越界的错误，最终在他人协助下完成了修复

修复后的代码 #

import sys
import random
import stdarray

n = int(sys.argv[1])

boy = 0
girl = 1
frequencies = stdarray.create1D(6, 0)

for i in range(n):
    boys = 0
    girls = 0
    while boys < 1 or girls < 1:
         child = random.randint(0, 2)
         if child == boy:
             boys += 1
         elif child == girl:
             girls += 1
    children = boys + girls
    if children >= 5:
         frequencies[5] += 1
    else:
         frequencies[children] += 1
    boys = 0
    girls = 0

（注：运行代码需确保已导入sys、random和stdarray模块）

预期命令行输出示例 #

python boysandgirls.py 1000  
Avg # children: 3  
Trials with 2 children: 490  
Trials with 3 children: 260  
Trials with 4 children: 143  
Trials with 5 or more children: 107  

python boysandgirls.py 1000  
Avg # children: 3 Trials with 2 children: 509  
Trials with 3 children: 245  
Trials with 4 children: 119  
Trials with 5 or more children: 127  

内容的提问来源于stack exchange，提问作者Abby Kabalin