#include<stdio.h>
#include<stdlib.h>
#include<ctype.h>
int main()
{
FILE *fp1, *fp2;
char ch;
fp1 = fopen("source.txt", "r");
if (fp1 == NULL)
{
puts("File does not exist..");
exit(1);
}
fp2 = fopen("target.txt", "w");
if (fp2 == NULL)
{
puts("File does not exist..");
fclose(fp1);
exit(1);
}
while((ch=fgetc(fp1))!=EOF)
{
ch = toupper(ch);
fputc(ch,fp2);
}
printf("\nFile successfully copied..");
return 0;
}