X-Y Data Combination

//
//  main.cpp
//  samuel
//
//  Created by Alexander Kevin on 2/26/15.
//  Copyright (c) 2015 Alexander Kevin. All rights reserved.
//

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

int main() {
    int x[25];
    int y;
    srand(time(NULL));
    y=rand()%20+1;//random pake berapa data
    for (int i=0; i<24; i++) {
        if(i>=y)
            x[i]=0;
        else
            x[i]=rand()%100+1;
    }
    printf("JUMLAH DATA : %d , KAPASITAS DATA 24\n",y);
    for (int i=0; i<24; i++) {
        if(i%3==0&&i!=0)
            printf("\n");
        printf("Data %d : %d   ",i+1,x[i]);
    }
    printf("\n\n\nOUTPUT\n=========\n");
    int z=0;
    for (int i=1;z!=y-1||i!=y; i++) {
        printf("Data %d-%d : %d | %d\n",z+1,i+1,x[z],x[i]);
        if(i==y-1){
            z++;
            i=z;
        }
    }
    getchar();
}