Program in C to copy one file to another

/* Write a C program which copies one file to another.*/

#include <stdio.h>

#include <conio.h>

#include <process.h>

void main(int argc, char *argv[])

{

            FILE *fs,*ft;

            char ch;

            clrscr();

            if(argc!=3)

            {

                        puts("Invalid number of arguments.");

                        exit(0);

            }

            fs = fopen(argv[1],"r");

            if(fs==NULL)

            {

                        puts("Source file cannot be opened.");

                        exit(0);

            }

            ft = fopen(argv[2],"w");

            if (ft==NULL)

            {

                        puts("Target file cannot be opened.");

                        fclose(fs);

                        exit(0);

            }

            while(1)

            {

                        ch=fgetc(fs);

                        if (ch==EOF)

                                    break;

                        else

                                    fputc(ch,ft);

            }

            fclose(fs);

            fclose(ft);

            getch();

}