C Exercises: Read an existing file
C File Handling : Exercise-2 with Solution
Write a program in C to read an existing file.
Sample Solution:
C Code:
#include <stdio.h>
#include <stdlib.h>
void main()
{
FILE *fptr;
char fname[20];
char str;
printf("\n\n Read an 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");
}
Sample Output:
Read and existing file : ------------------------------ Input the filename to be opened : test.txt The content of the file test.txt is : This is the content of the file test.txt
Flowchart:
C Programming Code Editor:
Have another way to solve this solution? Contribute your code (and comments) through Disqus.
Previous: Write a program in C to create and store information in a text file.
Next: Write a program in C to write multiple lines in a text file.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
C Programming: Tips of the Day
Static variable inside of a function in C
The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().
The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().
Ref : https://bit.ly/3fOq7XP
- New Content published on w3resource:
- HTML-CSS Practical: Exercises, Practice, Solution
- Java Regular Expression: Exercises, Practice, Solution
- Scala Programming Exercises, Practice, Solution
- Python Itertools exercises
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework
- Angular - JavaScript Framework
- Vue - JavaScript Framework
- Jest - JavaScript Testing Framework