C++ using define

#include <iostream>
using namespace std;

#define LENGTH 10
#define WIDTH 5
#define NEWLINE ‘\n’

int main()
{

int area;

area = LENGTH * WIDTH;
cout << area;
cout << NEWLINE;
return 0;
}

C++ basic addition

#include <iostream>
using namespace std;

main( )
{
//calculate between two numbers
float num1,num2;
cout << "Input first number: ";
cin >> num1;
cout << "Input second number: ";
cin >> num2;
cout << "The result of num1 + num2 is " << num1+num2 << endl;
}

C++ Input Name

#include <iostream>
using namespace std;

main( )
{
char name[20];
cout << "Input your name here: ";
cin >> name;
cout << endl;
cout << "Your name is " << name << endl;
}

C++ Hello World program

#include <iostream>
#include <conio.h>

using namespace std;

main() {

cout << "Hello World";

getch();
return 0;
}

C Program: How old are you?

#include <stdio.h>
#include<conio.h>
int main() {
int a;
printf("How old are you? \n");
scanf("%i", &a);
printf("Your age is %i.", a);
getch();
}

How to ask user enter name and display in C programming

#include <stdio.h>
int main() {

char a[20];
printf("Please enter your name: ");
scanf("%s", &a);
printf("Your name is %s", a);

return 0;

}