File Copying in C
We have already used the function fgetc( ) which reads characters from a file. Its counterpart is a function called fputc( ) which writes characters to a file. As a practical use of these character I/O functions we can copy the contents of one file into another, as demonstrated in the following program. This program takes the contents of a file and copies them into another file, character by character.
#include <stdio.h>
int main()
{
FILE *fs, *ft;
char ch;
fs = fopen("sourcefile.txt", "r");
if (fs == NULL)
{
puts("Cannot open source file");
exit(0);
}
ft = fopen("targetfile.txt", "w");
if (ft == NULL)
{
puts("Cannot open target file");
fclose(fs);
exit(0);
}
while (1)
{
ch = fgetc(fs);
if (ch == EOF)
break;
else
fputc(ch, ft);
}
fclose(fs);
fclose(ft);
getchar();
return 0;
}
