好的，所以我制作了一个 C++ 程序，它有两种单独的方法来生成随机密码，另一种方法是让用户生成并验证它。但是我在方法和返回密码时遇到错误。我是 C++ 新手，所以如果有人可以的话，我很感激给我一些指示我犯错误的地方。我在声明方法时遇到了麻烦，因为我不确定它们是否带参数以及它们是否应该是 int 或其他。我收到以下错误：
错误 C4430：缺少类型说明符 - 假定为 int。注意：C++ 不支持默认整数
错误 C4244：'argument'：从 'time_t' 转换为 'unsigned int'，可能丢失数据
错误 C2082：重新定义形式参数“str”
错误 C2660：“countLetters”：函数不接受 6 个参数
错误 C2110：“+”：无法添加两个指针
错误 C2660：“countLetters”：函数不接受 6 个参数
错误 C2110：“+”：无法添加两个指针
警告 C4018：“<”：有符号/无符号不匹配
谢谢，
#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <string>
#include <windows.h>
#include <ctime>
#include <string.h>
using namespace std;
#define MAX 80
//declaring functions
int showMenu();
int generatePass();
int validatePass();
int countLetters(char *, int *, int *, int *, int *);
main()
{
int iChoice;
// have menu appear, user makes decision, do work, reshow menu
// do this until user enters 5
do
{
iChoice = showMenu();
}while(iChoice != 3);
printf("\n\n\n");
system("pause");
} //end of main
//Methods placed here:
//showMenu method calls program menu,either 1.generate password,2.enter password and validate. or 3.exit(close program)
int showMenu() {
int iChoice;
system("cls");
printf("\n\n\t\tWelcome to Password Generator and Validator\n\n");
printf("\n\t\t1. Generate");
printf("\n\t\t2. Validate");
printf("\n\t\t3. Exit");
printf("\n\n\t\tEnter your menu choice: ");
fflush(stdin);
scanf("%d", &iChoice);
// user enters one of 3 values
// generate,validate or exit program
switch (iChoice) {
case 1: // generate
{
generatePass();
break;
}
case 2: // validate
{
validatePass();
break;
}
case 3: // exit
{
printf("\n\nProgram exiting!...");
break;
}
default: {
break;
}
} //end of switch
return (iChoice);
} //end of showMenu
//method to generate a random password for user following password guidelines.
string generatePass(string str) {
char password[MAX + 1];
int iChar, iUpper, iLower, iSymbol, iNumber, iTotal;
printf("\n\n\t\tGenerate Password selected ");
printf("\n\n\t\tPassword creation in progress... ");
srand(time(0));
string str =
"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!£$%^&*()_+=#@;";
int pos;
iChar = countLetters(password, &iUpper, &iLower, &iSymbol, &iNumber,
&iTotal);
if (iUpper < 2) {
printf("Not enough uppercase letters!!!\n");
} else if (iLower < 2) {
printf("Not enough lowercase letters!!!\n");
} else if (iSymbol < 1) {
printf("Not enough symbols!!!\n");
} else if (iNumber < 2) {
printf("Not enough numbers!!!\n");
} else if (iTotal < 9 && iTotal > 15) {
printf("Not enough characters!!!\n");
}
printf("\n\n\n Your new password is verified " + password);
printf("\n\n\n");
system("pause");
} //end of generatePass method.
//method to validate a user generated password following password guidelines.
int validatePass() {
char password[MAX + 1];
int iChar, iUpper, iLower, iSymbol, iNumber, iTotal;
//shows user password guidelines
printf("\n\n\t\tPassword rules: ");
printf(
"\n\n\t\t 1. Passwords must be at least 9 characters long and less than 15 characters. ");
printf("\n\n\t\t 2. Passwords must have at least 2 numbers in them.");
printf(
"\n\n\t\t 3. Passwords must have at least 2 uppercase letters and 2 lowercase letters in them.");
printf(
"\n\n\t\t 4. Passwords must have at least 1 symbol in them (eg ?, $, £, %).");
printf(
"\n\n\t\t 5. Passwords may not have small, common words in them eg hat, pow or ate.");
//gets user password input
printf("\n\n\t\tEnter your password following password rules: ");
gets(password);
iChar = countLetters(password, &iUpper, &iLower, &iSymbol, &iNumber,
&iTotal);
if (iUpper < 2) {
printf("Not enough uppercase letters!!!\n");
} else if (iLower < 2) {
printf("Not enough lowercase letters!!!\n");
} else if (iSymbol < 1) {
printf("Not enough symbols!!!\n");
} else if (iNumber < 2) {
printf("Not enough numbers!!!\n");
} else if (iTotal < 9 && iTotal > 15) {
printf("Not enough characters!!!\n");
}
printf("\n\n\n Your new password is verified " + password);
printf("\n\n\n");
system("pause");
} //end validatePass method
int countLetters(char * Password, int * Upper, int * Lower, int * Symbol,
int * Number) {
int iTotal = 0, iC, tU = 0, tL = 0, tS = 0, tN = 0;
//strlen- function that returns length
for (iC = 0; iC < strlen(Password); iC++) {
printf("%d", Password[iC]);
//uppercase letters are in the range 65 - 90
//lowercase letters are in the range 97 - 122
//check upper case
if ((Password[iC] < 64) && (Password[iC] < 91)) {
tU++;
iTotal++;
} else if ((Password[iC] > 96) && (Password[iC] < 123)) {
tL++;
iTotal++;
} else if ((Password[iC] > 32) && (Password[iC] < 48)) {
tS++;
iTotal++;
} else if ((Password[iC] > 47) && (Password[iC] < 58)) {
tN++;
iTotal++;
}
*Upper = tU;/*set value at memory address = tU,passing by reference saves memory used.*/
*Lower = tL;
*Symbol = tS;
*Number = tN;
} //end for statement
return (iTotal);
} //end of countLetters