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Generating random strings

How do you generate random strings in C?

Thank you.
Jan 5 '07 #1
3 5809
Banfa
9,065 Expert Mod 8TB
Random strigs of letters?

A crude method would be to generate a random number between 0 and 25 and add it to the character constant 'A' to get a letter. Then store the letters sequencially in a string terminating it with a zero terminator when you have enough letters.
Jan 8 '07 #2
Ganon11
3,652 Expert 2GB
Banfa's method will give you nonsense words that are 'randomized', a.k.a. "SJAORYEBRK".

If you mean randomly choose a word from a list of given words, generate a random number between 0 and the size of the list - 1, then select that word. For example:

Expand|Select|Wrap|Line Numbers
  1. string words[5] = {"Cat", "Dog", "Admin", "TheScripts", "Computer"};
  2. int pos = rand() % 5;
  3. cout << words[pos] << endl; // Randomly prints one of the above words
You will need to build your own list of words somehow.

EDIT: This code is for C++, you may have to use printf, etc for C
Jan 8 '07 #3
The idea is right, but you need to seed it.

#include <iostream>
#include <stdlib.h>
#include <time.h>
using namespace std;

int main(){
string words[5] = {"Cat", "Dog", "Admin", "TheScripts", "Computer"};
srand ((unsigned int)time(NULL)); // seeds the random [object] generator
int pos = rand() % 5;
cout << words[pos] << endl; // Randomly prints one of the above words
}
Sep 7 '14 #4

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