Question

How to generate random number between two numbers in C

Answer 1

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

int rand_interval(int lower, int upper) {
    return rand() %  (upper - lower + 1) + lower; 
}

int main() {
    srand(time(NULL));
    
    for (int i = 0; i < 20; i++) {
        printf("%d ", rand_interval(7, 13));
    }
    
    return 0;
} 
   
   
   
   
/*
run:
   
10 13 12 10 11 7 9 8 8 13 10 7 12 7 9 12 7 7 8 9 
   
*/

 

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