我的密码验证程序无法运行。我的循环似乎只迭代一次,我只是将“它”作为输出以查看它是否在不断迭代,但事实并非如此。我不确定为什么, bool 值正在工作,但它只迭代一次,如果我的第一个字母是小写字母,那么它会说我需要一个大写字母和一个数字,反之亦然,如果我的第一个字符是数字或大写。这是一项家庭作业,但我有点迷路了。任何帮助将不胜感激。
#include<iostream>
#include<string>
#include<cctype>
using namespace std;
int main()
{
const int LENGTH = 20;
char pass[LENGTH];
cout << "Enter a password, that's at least 6 characters long, one uppercase, one lowercase letter ";
cout << " and one digit." << endl;
cin.getline(pass,LENGTH);
bool isdig = true;
bool isdown = true;
bool isup = true;
bool correct = false;
for(int index = 0; correct == false; index++)
{
cout << "it" << endl;
if(isupper(pass[index]) == 0)
{isup = false;}
if(islower(pass[index]) == 0)
{isdown = false;}
if(isdigit(pass[index]) == 0)
{isdig = false;}
if(isdig == true && isup == true && isdown == true)
{correct = true;}
if(index = LENGTH - 1)
{
if(isdig == false)
{cout << "Your password needs a digit." << endl;}
if(isup == false)
{cout << "Your password needs an uppercase letter." << endl;}
if(isdown == false)
{cout << "Your password needs a lowercase letter." << endl;}
cout << "Re-enter another password. " << endl;
cin.getline(pass,LENGTH);
index = 0;
isdown = true;
isup = true;
isdig = true;
}
}
system("pause");
return 0;
}
最佳答案
问题可能出在这一行:
if(index = LENGTH - 1)
此处您分配 LENGTH - 1
的值给index
,所以您总是被要求重新输入您的密码作为该表达式始终为真。
关于c++ - String Verifier 字符循环无法正常工作,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17864272/