header ifndef
#ifndef HEADERFILE_H
#define HEADERFILE_H
#endifheader ifndef
#ifndef HEADERFILE_H
#define HEADERFILE_H
#endifC++ if else
#include<iostream>
using namespace std;
int main()
{
int grade;
cin >> grade;
if( grade >= 60 )
cout << "You Pass!" << endl;
else
cout << "You Fail..." << endl;
return 0;
}if c++
if (condition) {
// block of code to be executed if the condition is true
}if c++
int x = 20;
int y = 18;
if (x > y) {
cout << "x is greater than y";
}if c++
if (condition) {
// block of code to be executed if the condition is true
}Copyright © 2021 Codeinu
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