C Program Writes String to File

Comprehensive Collection of C Programming Examples

In this example, you will learn to write a sentence in a file using the fprintf() statement.

To understand this example, you should be familiar with the followingC Language ProgrammingTopic:

• C File Handling

• C Standard Library Functions

This program will store the user's input sentence in a file.

#include <stdio.h>
#include <stdlib.h>
int main() {
　　　　char sentence[1000];
　　　　//　Create a file pointer to handle the file
　　　　FILE　*fptr;
　　　　//Open the file in write mode
　　　　fptr = fopen("program.txt", "w");
　　　　//　exiting program　
　　　　if (fptr == NULL) {
　　　　　　　　printf("Error!");
　　　　　　　　exit(1);
　　　　}
　　　　printf("Enter a sentence:\n");
　　　　fgets(sentence, sizeof(sentence), stdin);
　　　　fprintf(fptr, "%s", sentence);
　　　　fclose(fptr);
　　　　return 0;
}

Output result

Enter a sentence: C Programming is fun
Here, a file named program.txt is created. The file will contain the text that C programming is fun.

In the program, the user input sentence is stored in the sentence variable.

Then, open the file namedprogram.txtfile. If the file does not exist, it will be created.

Finally, use the fprintf() function to write the user input string to this file and then close the file.

Comprehensive Collection of C Programming Examples