Question

How to pick a random digit from a number in C

Answer 1

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>

int main(void) {
    int num = 213859;
    char str[6];

    sprintf(str,"%d", num);

    int size = strlen(str);
  
    srand((unsigned int)time(NULL));
  
    int digit = str[rand() % (size - 1)] - '0';
  
    printf("%d", digit);
 
    return 0;
}
 
 
 
/*
run:
   
5
   
*/

 

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