{"id":1017,"date":"2024-10-19T13:41:52","date_gmt":"2024-10-19T08:11:52","guid":{"rendered":"https:\/\/codexplained.in\/?p=1017"},"modified":"2025-11-24T15:35:31","modified_gmt":"2025-11-24T10:05:31","slug":"merge-two-array","status":"publish","type":"post","link":"https:\/\/codexplained.in\/?p=1017","title":{"rendered":"Merge Two Array"},"content":{"rendered":"
\n#include <stdio.h>\n\nvoid mergeArrays(int arr1[], int size1, int arr2[], int size2, int merged[]) {\n    int i, j;\n\n    \/\/ Copy elements of the first array\n    for (i = 0; i < size1; i++) {\n        merged[i] = arr1[i];\n    }\n\n    \/\/ Copy elements of the second array\n    for (j = 0; j < size2; j++) {\n        merged[i + j] = arr2[j];\n    }\n}\n\nint main() {\n    int array1[] = {1, 3, 5, 7};\n    int array2[] = {2, 4, 6, 8};\n    int size1 = sizeof(array1) \/ sizeof(array1[0]);\n    int size2 = sizeof(array2) \/ sizeof(array2[0]);\n    int merged[size1 + size2];\n\n    mergeArrays(array1, size1, array2, size2, merged);\n\n    \/\/ Print the merged array\n    printf("Merged Array: ");\n    for (int k = 0; k < size1 + size2; k++) {\n        printf("%d ", merged[k]);\n    }\n    printf("\\n");\n\n    return 0;\n}\n\n<\/pre><\/div>\n\n\n
Explanation<\/h3>\n\n\n\n
    \n
  1. Include Headers<\/strong>: The program begins with the inclusion of the standard input-output header (<stdio.h><\/code>).<\/li>\n\n\n\n
  2. Function Definition<\/strong>: The mergeArrays<\/code> function takes two arrays along with their sizes and a third array to store the merged result.<\/li>\n\n\n\n
  3. Copying Elements<\/strong>:\n
      \n
    • The first for<\/code> loop copies elements from the first array (arr1<\/code>) to the merged array.<\/li>\n\n\n\n
    • The second for<\/code> loop continues copying elements from the second array (arr2<\/code>) to the merged array, starting from the index after the last element copied from arr1<\/code>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • Main Function<\/strong>:\n
        \n
      • Two example arrays, array1<\/code> and array2<\/code>, are defined, along with their sizes.<\/li>\n\n\n\n
      • A merged<\/code> array is created to hold the combined elements.<\/li>\n\n\n\n
      • The mergeArrays<\/code> function is called to perform the merging.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
      • Print Result<\/strong>: Finally, the merged array is printed to the console.<\/li>\n<\/ol>\n\n\n\n
        Output<\/h3>\n\n\n\n
        For the input arrays {1, 3, 5, 7}<\/code> and {2, 4, 6, 8}<\/code>, the output will be:<\/p>\n\n\n\n
        javascriptCopy codeMerged Array: 1 3 5 7 2 4 6 8 \n<\/code><\/pre>\n\n\n\n
        This program effectively merges two arrays into one, achieving O(n + m) time complexity, where n and m are the sizes of the two input arrays.<\/p>\n\n\n\n
        4o mini<\/p>\n