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C Programming Exercises

C Exercises: Read and existing file

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C File Handling : Exercise-2 with Solution

Write a program in C to read an existing file.
Test Data :
Input the filename to be opened : test.txt
Expected Output :

 The content of the file test.txt is  :                                                                       
This is the content of the file test.txt.

C Code:

#include <stdio.h>
#include <stdlib.h>

void main()
{
	FILE *fptr;
	char fname[20];
	char str;
    printf("\n\n Read and existing file :\n");
	printf("------------------------------\n"); 
	printf(" Input the filename to be opened : ");
	scanf("%s",fname);
	fptr = fopen (fname, "r");  
	if (fptr == NULL)
	{
		printf(" File does not exist or cannot be opened.\n");
		exit(0);
	}
	printf("\n The content of the file %s is  :\n",fname);
	str = fgetc(fptr);
	while (str != EOF)
		{
			printf ("%c", str);
			str = fgetc(fptr);
		}
	fclose(fptr);
    printf("\n\n");
}

Flowchart :

Flowchart: Read and existing file

C Practice online:


#include <stdio.h>
#include <stdlib.h>

void main()
{
	FILE *fptr;
	char fname[20];
	char str;
    printf("\n\n Read and existing file :\n");
	printf("------------------------------\n"); 
	printf(" Input the filename to be opened : ");
	scanf("%s",fname);
	fptr = fopen (fname, "r");  
	if (fptr == NULL)
	{
		printf(" File does not exist or cannot be opened.\n");
		exit(0);
	}
	printf("\n The content of the file %s is  :\n",fname);
	str = fgetc(fptr);
	while (str != EOF)
		{
			printf ("%c", str);
			str = fgetc(fptr);
		}
	fclose(fptr);
    printf("\n\n");
}

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