c/c++语言开发共享华为笔试——C++转换字符串问题

 1 #include <iostream>  2 #include <string>  3 #include <conio.h>  4 using namespace std;  5 int main()  6 {  7     char c;  8     int count = 0;  9     int size = 20; 10     int i; 11     char *password = new char[size]; 12     string str; 13     while ((c = _getch()) != 'r') { 14         if (count >= size - 1) { 15             cout << "error!" << endl; 16             continue; 17         } 18         if ((c >= 'a' && c <= 'z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9')) {  // 密码只可包含数字和字母 19             cout << c; 20             password[count] = c; 21             count++; 22         } 23     } 24     password[count] = ''; 25     cout << endl; 26     for (i = 0; i < count; i++) 27     { 28         if (i % 2 == 0) 29         { 30             cout << password[i]; 31         } 32     } 33     return 0; 34 }