p15

Write a C program that will ask the user to input a file name and copy the contents of that file into another file.

#include <stdio.h> #include <stdlib.h> // For exit()   int main() {     FILE *fptr1, *fptr2;     char filename[100], c;       printf("Enter the filename to open for reading \n");     scanf("%s", filename);       // Open one file for reading     fptr1 = fopen(filename, "r");     if (fptr1 == NULL)     {         printf("Cannot open file %s \n", filename);         exit(0);     }       printf("Enter the filename to open for writing \n");     scanf("%s", filename);       // Open another file for writing     fptr2 = fopen(filename, "w");     if (fptr2 == NULL)     {         printf("Cannot open file %s \n", filename);         exit(0);     }       // Read contents from file     c = fgetc(fptr1);     while (c != EOF)     {         fputc(c, fptr2);         c = fgetc(fptr1);     }       printf("\nContents copied to %s", filename);       fclose(fptr1);     fclose(fptr2);     return 0; }

Output:

Enter the filename to open for reading
a.txt
Enter the filename to open for writing
b.txt
Contents copied to b.txt