hello world code


 #include<iostream>

using namespace std;

// or use "std::" before cout_function
/*this
is
a
multiline
comment*/
/*comment is not red by the compiler
how many lines space does not matter in c++*/


int main() {
    cout<< "hello world";
    return 0;

}

Comments

Post a Comment

Popular posts from this blog

Function Overloading in C++

  #include <iostream> using namespace std ; int sum ( int a , int b ){     cout << "by function1 is " ;     return a + b; } int sum ( int a , int b , int c ){     cout << "by function2 is " ;     return a + b + c; } int volume ( int a ){     return a * a * a; } int volume ( int r , int h ){     return 3.14 * r * r * h; } int volume ( int l , int b , int h ){     return l * b * h; } int main (){     cout << "the sum of 5 and 7 " << sum ( 5 , 7 ) << endl;     cout << "the sum of 5, 7 and 57 " << sum ( 5 , 7 , 57 ) << endl;     cout << "the volume of cube of side length 5 is " << volume ( 5 ) << endl;     cout << "the volume of cylinder of radius 5 and height 7 is " << volume ( 5 , 7 ) << endl;     cout << "the volume of cuboid of length 5, bredth 7...
Read more

inline function, static variables, default arguments, constant arguments

  #include <iostream> using namespace std ; // int product(int a, int b) // { //     int c = a*b; //     return c; // } /***********INLINE FUNCTION********* */ /*C++ provides inline functions to reduce the function call overhead. An inline function is a function that is expanded in line when it is called.  When the inline function is called whole code of the inline function gets inserted   or substituted at the point of the inline function call. This substitution is   performed by the C++ compiler at compile time. An inline function may increase   efficiency if it is small.*/   //bade functions m inline function use nhi krna as vo pura replace hojaega   //call ki jagah so zyada memory khaega   //incline function ek request hoti hai to the compiler, compiler decide krta hai vo requst accept krni ya nahi inline int product ( int a , int b ) {     int c = a * b;     //use of static variables is n...
Read more

scope resolution operator, literals, reference variables, typecasting in c++

  #include <iostream> using namespace std ; int c = 15 ; //global variable int main (){     int a , b ; //local variables (preference is given to local variables)     cout << "enter the value of a: " << endl ;     cin >> a ;     cout << "enter the value of b: " << endl ;     cin >> b ;     int c = a + b ;     cout << "the sum is " << a + b << endl ;     cout << "the value of c is " << :: c << endl ; //this (::) is scope resolution operator, it is used to print a global variable inside the function     //LITERALS IN C++     //float x=5.7;     //long double y=5.7; //now 5.7 is a double by default by the compiler, we can use specific keywords to make a variable float double or long double     //cout<<"the value of x is "<<x<<endl<<"the value of y is "<...
Read more