Program 202:Reading a File and Printing on console

Program 202:
 

#include<stdio.h>
#include<stdlib.h>
 main ()
 {
    FILE *file;
    char c;
    file=fopen("file123.txt","r");
    while(1)
    {
     if(file==NULL)
     {
      printf("File Not Found\n");
      exit(0);
     }
     else
     {
      c=fgetc(file);
      if(c==EOF)
      {
       break;
      }
      printf("%c",c);
     }
    }
    fclose(file);
 }

Explanation:

1. Declaring file which is FILE pointer and using fopen to open the file with read mode

2. while(1)
   {
      if(file==NULL)
      {
        printf("File Not Found\n");
        exit(0);
      }
      else
      {
        c=fgetc(file);
        if(c==EOF)
        {
          break;
        }
        printf("%c",c);
      }
    }
   
   

   If file123.txt doesnot exist in the expected location in our local machine/pc then file variable will be null(null means nothing or empty in coding).
3. If file==null we are printing File not found 
4. If there is file then while loop continuosly iterate by retrieving character by character using fgetc(file) which will retrieve one character at a time and print that character on console using printf("%c",c); 
5. If we reach End of the File then fgetc returns EOF to file pointer then we will break our loop and come out of it
6. Finally, we should close/terminate the file that is opened using fclose 

Output:

Store both text file and program in same folder.Here I named text file as file123.txt