Append File

Easy File Handling
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Problem Statement

Write a C program to append a new string to an existing text file ‘test.txt’ using append mode (“a”).

Input Format

Two space-separated strings S1 (initial) and S2 (to append).

Output Format

Print the combined file content after appending.

Constraints

1 <= Length <= 50

Sample Input

Hello World

Sample Output

HelloWorld

Explanation

Writes S1, closes file, reopens in append mode ("a"), appends S2, then reads back entire content.

Starter Code

#include <stdio.h>

int main() {
    char s1[51], s2[51];
    if (scanf("%50s %50s", s1, s2) == 2) {
        // Write your code here
    }
    return 0;
}

Limits

  • Time Limit: 1s
  • Memory Limit: 256MB

Embedded C Programming

Updated: March 15, 2026
Intermediate

Embedded systems rely on efficient low-level programming to interact directly with hardware. In this course, you will learn how to write practical Embedded C programs used in real microcontroller-based systems. Rather than focusing only on theory, this course follows a practice-driven approach. Each lesson includes hands-on coding exercises that simulate real firmware development tasks used