C PROGRAM WHEN I RUN IT, I GET THE ANSWER NOT BUILD #include #include #include  void main() {    FILE *fp1, *fp2;    char a;    clrscr();    fp1 = fopen("infile.txt", "r");    if (fp1 == NULL) {       puts("cannot open this file");       exit(1);    }    fp2 = fopen("outfile.txt", "w");    if (fp2 == NULL) {       puts("Not able to open this file");       fclose(fp1);       exit(1);    }  do {       a = fgetc(fp1);       a = toupper(a);       fputc(a, fp2);    } while (a != EOF);  fcloseall();  getch(); }

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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C PROGRAM WHEN I RUN IT, I GET THE ANSWER NOT BUILD

#include<stdio.h>

#include<stdlib.h>

#include<process.h>

 void main() {

   FILE *fp1, *fp2;

   char a;

   clrscr();

   fp1 = fopen("infile.txt", "r");

   if (fp1 == NULL) {

      puts("cannot open this file");

      exit(1);

   }

   fp2 = fopen("outfile.txt", "w");

   if (fp2 == NULL) {

      puts("Not able to open this file");

      fclose(fp1);

      exit(1);

   }

 do {

      a = fgetc(fp1);

      a = toupper(a);

      fputc(a, fp2);

   } while (a != EOF);

 fcloseall();

 getch();

}

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