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).
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).
file1.txt
Welcome to StudyGlance, file2.txt
A Fully loaded Notebook.C 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
Welcome to StudyGlance, A Fully loaded Notebook.💻 Run This C Program
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).
The selected C program is loaded automatically. Edit the code,
provide input through STDIN and click Run.
The compiler is embedded using OneCompiler. Your program runs in
the embedded C environment; Study Glance does not execute C code
directly on your web server.