验证码（函数实现）

来源：互联网发布：linux解压zip文件编辑：程序博客网时间：2024/05/10 12:43

#include<iostream>#include<stdlib.h>#include<time.h>using namespace std; void generate_lower(){char lower;int lower_index;lower_index = 1 + (int)(26.0*rand() / (RAND_MAX + 1.0));lower = char(lower_index + 96);cout << lower;}void generate_upper(){char upper;int upper_index;upper_index = 1 + (int)(26.0*rand() / (RAND_MAX + 1.0));upper = char(64 + upper_index);cout << upper;}void generate_number(){int number;number = 0 + (int)(9.0*rand() / (RAND_MAX + 1.0));cout << number;}int main(){srand((int)time(0));int num;int upper;int lower;int number;while (1){cout << "请输入验证码的位数: ";cin >> num;cout << "在这" << num << "位验证码中，需要大写字母，小写字母，数字各几位，请输40入";cin >> upper >> lower >> number;while (upper){generate_upper();upper--;}while (lower){generate_lower();lower--;}while (number){generate_number();number--;}cout << endl << "是否继续产生随即验证码？" << endl;cout << "1.是 2.否" << endl;int y;cin >> y;cout << endl;if (y == 1){}if (y == 2){cout << "退出系统" << endl;break;}}return 0;}

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