如何使用C ++创建随机的字母数字字符串？
在本节中，我们将看到如何使用C++生成随机的字母数字字符串。在这里，我们提供小写字母，大写字母和数字(0-9)。该程序随机获取字符，然后创建随机字符串。
Input: Here we are giving the string length Output: A random string of that length. Example “XSme6VAsvJ”
算法
Step 1:Define array to hold all uppercase, lowercase letters and numbers Step 2: Take length n from user Step 3: Randomly choose characters’ n times and create a string of length n Step 4: End
范例程式码
#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>
using namespace std;
static const char alphanum[] = "0123456789" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "abcdefghijklmnopqrstuvwxyz";
int len = sizeof(alphanum) - 1;
char genRandom() { // Random string generator function.
return alphanum[rand() % len];
}
int main() {
srand(time(0));
int n;
cout << "Enter string length: ";
cin >> n;
for(int z = 0; z < n; z++) { //generate string of length n
cout << genRandom(); //get random character from the given list
}
return 0;
}输出结果
Enter string length: 10 XSme6VAsvJ