C fputs() fgets()

C Write File:

File handling simply means to open a file and to process it according to the required tasks. Writing data in a file is one of the common feature of file handling. In C, there are various modes that facilitates different ways and features of writing data into a file, including: w, r+, w+, a+, wb, rb+, wb+, or ab+ mode. C also supports some functions to write to a file.

C Write File functions are:

• C fprintf()
• C fputs()
• C fputc()
• C fputw()

C fputs() function:

To write a string (line of characters) into a file in C, fputs() function is used.

Syntax:

fputs(const char *s, FILE *stream)

Example  1: Example of fputs() function.

#include <stdio.h>  
void main()
{  
FILE *f;  
f = fopen("file.txt", "w");
fputs("Reading data from a file is a common feature of file handling..",f);
printf ("Data Successfully Written to the file!");
fclose(f);  
}

Output

Data Successfully Written to the file!

C Read File:

Reading data from a file is another common feature of file handling. In C, there are various functions that facilitates different ways and features of reading data from a file, including: reading all file data at a single go, reading the file data line by line and even to read the file data character by character.

C Read File functions are:

• C fscanf()
• C fgets()
• C fgetc()
• C fgetw()

C fgets() function:

To read a string (line of characters) from a file in C, fgets() function is used.

Syntax:

fgets(char *s, int n, FILE *stream)

Example  2: Example of fgets() function.

#include <stdio.h>  
void main()
{  
FILE *f;  
f = fopen("file.txt", "w");
fputs("Reading data from a file is a common feature of file handling..",f);
fclose(f);  
 
char arr[100];  
f = fopen("file.txt","r");  
printf("%s",fgets(arr,65,f));  
fclose(f);  
}

Output

Reading data from a file is a common feature of file handling..

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