C Program to Read Data from File

This C Program illustrates reading of data from a file. The program opens a file which is present. Once the file opens successfully, it uses libc fgetc() library call to read the content.

Here is source code of the C program to illustrate reading of data from a file. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C program to illustrate how a file stored on the disk is read

```
 */
```
```
#include <stdio.h>
```
```
#include <stdlib.h>
```
```
 
```
```
void main()
```
```
{
```
```
    FILE *fptr;
```
```
    char filename[15];
```
```
    char ch;
```
```
 
```

    printf("Enter the filename to be opened \n");

```
    scanf("%s", filename);
```
```
    /*  open the file for reading */
```
```
    fptr = fopen(filename, "r");
```
```
    if (fptr == NULL)
```
```
    {
```
```
        printf("Cannot open file \n");
```
```
        exit(0);
```
```
    }
```
```
    ch = fgetc(fptr);
```
```
    while (ch != EOF)
```
```
    {
```
```
        printf ("%c", ch);
```
```
        ch = fgetc(fptr);
```
```
    }
```
```
    fclose(fptr);
```
```
}
```

$ cc pgm96.c
$ a.out
Enter the filename to be opened
pgm95.c
/*
 * C program to create a file called emp.rec and store information
 * about a person, in terms of his name, age and salary.
 */
 
#include <stdio.h>
 
void main()
{
    FILE *fptr;
    char name[20];
    int age;
    float salary;
 
    fptr = fopen ("emp.rec", "w"); /* open for writing*/
 
    if (fptr == NULL)
    {
        printf("File does not exists \n");
        return;
    }
    printf("Enter the name \n");
    scanf("%s", name);
    fprintf(fptr, "Name    = %s\n", name);
    printf("Enter the age \n");
    scanf("%d", &age);
    fprintf(fptr, "Age     = %d\n", age);
    printf("Enter the salary \n");
    scanf("%f", &salary);
    fprintf(fptr, "Salary  = %.2f\n", salary);
    fclose(fptr);
}

Sanfoundry Global Education & Learning Series – 1000 C Programs.

Here’s the list of Best Books in C Programming, Data-Structures and Algorithms

If you wish to look at other example programs on File Handling, go to C Programming Examples on File Handling. If you wish to look at programming examples on all topics, go to C Programming Examples.

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