File Handling

 File Handling

File handling in C allows you to read from and write to files on the disk. You can perform operations like opening files, reading data, writing data, and closing files.

#include <stdio.h>

int main() {

    FILE* file = fopen("data.txt", "w"); // Open the file in write mode

    if (file == NULL) {

        printf("File could not be opened.\n");

        return 1;

    }

    fprintf(file, "Hello, World!\n"); // Write data to the file

    fclose(file); // Close the file

    file = fopen("data.txt", "r"); // Open the file in read mode

    if (file == NULL) {

        printf("File could not be opened.\n");

        return 1;

    }

    char buffer[100];

    fgets(buffer, sizeof(buffer), file); // Read data from the file

    printf("Data: %s", buffer);

    fclose(file); // Close the file

    return 0;

}