python计算鸡兔同笼

以下是一个使用面向过程方法解决鸡兔同笼问题的Python代码示例：

def calculate_chicken_rabbit(total_heads, total_legs):
    for chicken_count in range(total_heads + 1):
        rabbit_count = total_heads - chicken_count
        if (2 * chicken_count + 4 * rabbit_count) == total_legs:
            return chicken_count, rabbit_count
    return None

total_heads = 20
total_legs = 56
result = calculate_chicken_rabbit(total_heads, total_legs)
if result:
    chicken_count, rabbit_count = result
    print("鸡的数量为:", chicken_count)
    print("兔的数量为:", rabbit_count)
else:
    print("无法计算鸡兔的数量")