Write a C program to append a new string to an existing text file ‘test.txt’ using append mode (“a”).
Two space-separated strings S1 (initial) and S2 (to append).
Print the combined file content after appending.
1 <= Length <= 50
Hello World
HelloWorld
Writes S1, closes file, reopens in append mode ("a"), appends S2, then reads back entire content.
#include <stdio.h>
int main() {
char s1[51], s2[51];
if (scanf("%50s %50s", s1, s2) == 2) {
// Write your code here
}
return 0;
}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