Question

How to fill a large array by repeatedly copying the values from a small array in C

Answer 1

#include <stdio.h>

int main() {
    int smallarray[] = { 1, 2, 3, 4, 5 }; 
    int largearray[30];
    
    int largelen = sizeof(largearray) / sizeof(largearray[0]);
    int smallelen = sizeof(smallarray) / sizeof(smallarray[0]);
    
    for (int i = 0; i < largelen; i++) {
        largearray[i] = smallarray[i % smallelen];
    }
    
    for (int i = 0; i < largelen; i++) {
        printf("%d ", largearray[i]);
    }
    
    return 0;
}

 
 
/*
run:
 
1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5   
 
*/

 

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