Question

1) Write a complete C or C++ program to print Hello World Greetings.

2) Using the command line, compile and generate the executable for the above program. Let’s call helloWorld the target executable.

3) Write a C program that does the following:

a) forks a child to execute helloWorld

b) waits for the child execution to end

4) Reuse the above program to try a different variant of exec family of system calls.

OPTIONAL:

1) write a program main that takes two operands, computes their sum, and prints the results. The 2 operands are given as arguments in the command line. A typical execution looks like:

./main 5 7

12

2) Using the command line, compile and generate the executable for the above program. Let’s call main the target executable.

3) Write a C program that does the following:

a) forks a child to execute main; recall that main takes two operands

b) waits for the child execution to end

4) Reuse the above program to try a different variant of exec family of system calls.

Answer 1

Since you have posted multiple problems I shall solve only first two problems because first and second problem is interrelated.

1. Code

#include<stdio.h>

int main()
{
   printf("Hello World!!!\n");
}

2. Command line operations