Example: C Program to Read a Line from a File

// C Program to Read a Line from a File
#include <stdio.h>
#include <stdlib.h>

// It's the main function of the program
int main() {
    // Step-1 Open a file named 'hello.txt' by creating a file pointer
    FILE* file_string = fopen("./hello.txt", "r");

    // Step-2 Buffer to store the each line of the opened file
    char sentence[256];

    // Step-3 Check if file didn't open
    if (file_string == NULL) {
        fprintf(stderr, "Unable to open file!\n");
    }

    // Step-4 If the file is opened then read each line of the opened file
    else {
        printf("Opened file string: 'hello.txt'\n");
        printf("-----------------------------------------------------------------------\n\n");

        // Iterate over each line of the file and store into 'sentence' Buffer
        while (fgets(sentence, sizeof(sentence), file_string)) {
            // Print each line of the file
            printf("%s", sentence);
        }

        // Close the opened file when the file stream is completed
        fclose(file_string);

        printf("\n\n-----------------------------------------------------------------------\n");
    }
    return 0;
}