Write a program to merge two files into a third file || C Lab Program

 WAP_D02: Write a C program to merge two files into a third file (i.e., the contents of the first file followed by those of the second are put in the third file).|| Files

file1.txt

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file2.txt

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WAP_D02: C Lab Program

//to merge two files into a third file. #include <stdio.h> #include <ctype.h>   int main() {     FILE *file1, *file2, *file3;     char ch;     // Open first file     file1 = fopen("file1.txt", "r");     if (file1 == NULL) {         printf("Error opening first file.\n");         return 1;     }     // Open second file     file2 = fopen("file2.txt", "r");     if (file2 == NULL) {         printf("Error opening second file.\n");         fclose(file1);         return 1;     }     // Open third file (output)     file3 = fopen("file3.txt", "w");     if (file3 == NULL) {         printf("Error creating destination file.\n");         fclose(file1);         fclose(file2);         return 1;     }     // Copy contents of first file     while ((ch = fgetc(file1)) != EOF) {         fputc(ch, file3);     }     // Copy contents of second file     while ((ch = fgetc(file2)) != EOF) {         fputc(ch, file3);     }     printf("Files merged successfully.");     // Close all files     fclose(file1);     fclose(file2);     fclose(file3);     return 0; }

OUTPUT

Files merged successfully

file3.txt

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