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
Welcome Belgaum, Boy.
file2.txt
How are you?
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
Welcome Belgaum, Boy. How are you?
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