Example: Convert an Array into Zig Zag in C language using Function

// Convert an Array into Zig Zag in C language using Function
#include <stdio.h>
#include <stdbool.h>
#define N 100
// `stdbool.h` header file loaded to call the boolean data type

void makeZigZag(int arru[], int n) {
    bool flag = true;
    int temp;

    for (int i = 0; i <= n - 2; i++) {
        if (flag) {
            if (arru[i] > arru[i + 1]) {
                temp = arru[i];
                arru[i] = arru[i + 1];
                arru[i + 1] = temp;
            }
        }
        else {
            if (arru[i] < arru[i + 1]) {
                temp = arru[i];
                arru[i] = arru[i + 1];
                arru[i + 1] = temp;
            }
        }
        flag = !flag;
    }
}

int main() {
    int arru[N], x;
   	// arru - it will store array elements
   	// x - size of array

    printf("-----enter the size of the array-----\n");
    scanf("%d", &x);

    printf("-----Enter the %d elements one by one-----\n", x);
    for (int i = 0; i < x; i++) {
        scanf("%d", &arru[i]);
    }

   	// This will change the array position into zig-zag
    printf("\n-----The zig-zag pattern-----\n");
    makeZigZag(arru, x);
    for (int i = 0; i < x; i++)
        printf("%d,  ", arru[i]);
    printf("\n");

    return 0;
}