C Program to Merge Two Sorted Array in Ascending Order
Write a C program to merge two sorted arrays into a single sorted array.
- Initializes two sorted arrays and a third array to store the merged result.
- Merges both arrays in sorted order using a while loop with index pointers.
- Appends any remaining elements from either array after one is fully traversed.
- Prints the final merged sorted array to the console.
Example : pgm.c
#include <stdio.h> // Function to merge two sorted arrays void mergeSortedArrays(int arr1[], int size1, int arr2[], int size2, int mergedArr[]) { int i = 0, j = 0, k = 0; // Merge elements from both arrays in ascending order while (i < size1 && j < size2) { if (arr1[i] < arr2[j]) { mergedArr[k++] = arr1[i++]; } else { mergedArr[k++] = arr2[j++]; } } // Copy any remaining elements from arr1 while (i < size1) { mergedArr[k++] = arr1[i++]; } // Copy any remaining elements from arr2 while (j < size2) { mergedArr[k++] = arr2[j++]; } } int main() { int arr1[] = {1, 3, 5, 7}; // First sorted array int arr2[] = {2, 4, 6, 8, 9}; // Second sorted array int size1 = sizeof(arr1) / sizeof(arr1[0]); int size2 = sizeof(arr2) / sizeof(arr2[0]); int mergedArr[size1 + size2]; // Array to store the merged result // Call function to merge arrays mergeSortedArrays(arr1, size1, arr2, size2, mergedArr); // Print the merged sorted array printf("Merged Sorted Array: "); for (int i = 0; i < size1 + size2; i++) { printf("%d ", mergedArr[i]); } return 0; }
Output:
Merged Sorted Array: 1 2 3 4 5 6 7 8 9