Read File

Easy File Handling
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Problem Statement

Write a C program to read content from an existing text file ‘test.txt’ character by character and print it.

Input Format

A single word string S (pre-written to test.txt).

Output Format

Print the content read from test.txt.

Constraints

1 <= Length <= 100

Sample Input

HelloEdcret

Sample Output

HelloEdcret

Explanation

Opens test.txt in read mode ("r"), reads all characters using fgetc, and outputs them.

Starter Code

#include <stdio.h>

int main() {
    char s[101];
    if (scanf("%100s", s) == 1) {
        FILE *fp = fopen("test.txt", "w");
        fprintf(fp, "%s", s);
        fclose(fp);
        // Write your code here to read back and print
    }
    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