FPRINTF()

this function takes an output from the program and saves it in a text file on the disk

SYNTAX

FILE *file = fopen("output.txt", "w");
fprintf(file, "Writing plain text using fprintf only.\n");

 * the "w" mode creates the file if it doesn't exist and overwrites it if it does
 * the fprintf writes formatted text to the file.

USAGE:

#include <stdio.h>

void run_main_program() {
    // Step 1: Open file in write mode
    FILE *file = fopen("/home/chef/workspace/help.txt", "w");

    // Step 2: Check if file opened successfully
    if (file == NULL) {
        printf("Error opening help.txt\n");
    }
    else{
        // Step 3: Write 3 lines using fprintf
        fprintf(file, "Line 1: Use --help to show options.\n");
        fprintf(file, "Line 2: Use --version to check version.\n");
        fprintf(file, "Line 3: Use --exit to quit the program.\n");

        // Step 4: Close the file
        fclose(file);
    }
}

int main() {
    run_main_program();
    return 0;
}

USAGE:

#include <stdio.h>

void run_main_program() {
    // Step 1 - Open file in write mode
    FILE* file = fopen("/home/chef/workspace/quotes.txt", "w");

    // Step 2 - Check if file opened successfully
    if (file == NULL) {
        printf("Error opening quotes.txt\n");
    }
    else{
        char* quotes[5] = {
            "Stay positive.",
            "Keep learning.",
            "Believe in yourself.",
            "Never give up.",
            "Code with confidence."
        };

        // Step 3 - Use loop to write above quotes
        for (int i = 0; i < 5; i++){
            fprintf(file, "Quote %d: %s\n", i + 1, quotes[i]);
        }

        // Step 4 - Close the file
        fclose(file);
    }

}

//Main
int main() {
    run_main_program();
    return 0;
}