C Program to Append the Content of One File to the End of Another File

This C Program appends the content of file at the end of another.

Here is source code of the C Program to append the content of file at the end of another. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C Program to Append the Content of File at the end of Another

```
 */
```
```
#include <stdio.h>
```
```
#include <stdlib.h>
```
```
 
```
```
main()
```
```
{
```
```
    FILE *fsring1, *fsring2, *ftemp;
```

    char ch, file1[20], file2[20], file3[20];

```
 
```

    printf("Enter name of first file ");

```
    gets(file1);
```

    printf("Enter name of second file ");

```
    gets(file2);
```

    printf("Enter name to store merged file ");

```
    gets(file3);
```
```
    fsring1 = fopen(file1, "r");
```
```
    fsring2 = fopen(file2, "r");
```

    if (fsring1 == NULL || fsring2 == NULL)

```
    {
```
```
        perror("Error has occured");
```

        printf("Press any key to exit...\n");

```
        exit(EXIT_FAILURE);
```
```
    }
```
```
    ftemp = fopen(file3, "w");
```
```
    if (ftemp == NULL)
```
```
    {
```
```
        perror("Error has occures");
```

        printf("Press any key to exit...\n");

```
        exit(EXIT_FAILURE);
```
```
    }
```

    while ((ch = fgetc(fsring1)) != EOF)

```
        fputc(ch, ftemp);
```

    while ((ch = fgetc(fsring2) ) != EOF)

```
        fputc(ch, ftemp);
```

    printf("Two files merged  %s successfully.\n", file3);

```
    fclose(fsring1);
```
```
    fclose(fsring2);
```
```
    fclose(ftemp);
```
```
    return 0;
```
```
}
```

$ cc pgm47.c
$ a.out
Enter name of first file a.txt
Enter name of second file b.txt
Enter name to store merged file merge.txt
Two files merged merge.txt successfully.

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If you wish to look at other example programs on File Handling, go to File Handling. If you wish to look at programming examples on all topics, go to C Programming Examples.

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