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

typedef int vint10[10];
typedef int vint20[20];

int main(void) {
    vint10 a, b;
    vint20 c;
    srand(time(NULL));
    for(int i = 0; i < 10; i++) {
        a[i] = rand() % 100;
        b[i] = rand() % 100;
        printf("a[%02d]=%2d, b[%02d]=%2d\n", i, a[i], i, b[i]);
    }
    printf("---\n");
    for(int i = 0; i < 20; i++) {
        c[i] = i < 10 ? a[i] : b[i-10];
        printf("c[%02d]=%2d\n", i, c[i]);
    }
    return 0;
}