Here it is a simple Hello, World source code in C and C++ languages: C Version: #include<stdio.h>main(){printf(“Hello, World!n”);} C++ Version: #include<iostream>using namespace std;main()  // In C/C++, double slashes (//) denote a comment, causing the compiler to ignore the rest of the line. If a return type is omitted from the main() function, the compiler assumes