Someone asked me how to merge two arrays into one array by using the C programming language so that here we are sharing a C program which will merge the two arrays into one array and print the output.

C Program to Merge Two arrays

#include<stdio.h>

int main() {

int arr1[30], arr2[30], res[60];

int i, j, k, n1, n2;

printf("\nEnter no of elements in 1st array :");

scanf("%d", &n1);

for (i = 0; i < n1; i++) {

scanf("%d", &arr1[i]);

}

printf("\nEnter no of elements in 2nd array :");

scanf("%d", &n2);

for (i = 0; i < n2; i++) {

scanf("%d", &arr2[i]);

}

i = 0;

j = 0;

k = 0;

// Merging starts

while (i < n1 && j < n2) {

if (arr1[i] <= arr2[j]) {

res[k] = arr1[i];

i++;

k++;

} else {

res[k] = arr2[j];

k++;

j++;

}

/* Some elements in array 'arr1' are still remaining

where as the array 'arr2' is exhausted */

while (i < n1) {

res[k] = arr1[i];

i++;

k++;

}

/* Some elements in array 'arr2' are still remaining

where as the array 'arr1' is exhausted */

while (j < n2) {

res[k] = arr2[j];

k++;

j++;

}

//Displaying elements of array 'res'

printf("\nMerged array is :");

for (i = 0; i < n1 + n2; i++)

printf("%d ", res[i]);

return (0);

}

Output is:

C Program to Merge Two arrays

Prem Tiwari

Prem Tiwari is the founder of FreeWebMentor.com and also a professional developer and a blogger by hobby.

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C Program to Merge Two arrays