cpp-course/variable.cpp at main · Maxris/cpp-course · GitHub

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#include<iostream>
#include<string>
#include<cmath>

usingnamespacestd;

intmain()
{
//init a variable
intuserAge(30);

doublepi(3.14);

booliLoveProgramming(true);

charaSimpleLettrer('m');

//display a variable

 cout << "ur age is : " << userAge << endl;
 cout << "the letter is : " << aSimpleLettrer << endl;
 cout << " is love programming is : " << iLoveProgramming << endl << endl;

//give 2 or more names to a variable

intmyAge(29);
int& alsoMyAge(myAge);

 cout << "I'm " << myAge << "old (variable)" << endl << endl;
 cout << "I'm " << alsoMyAge << "old (ref to the variable)" << endl;

//cin

 string userName;
 cout << "what's your name ?" << endl;
//cin >> userName; will catch the first world only
getline(cin, userName);//using get line to catch all char from the user
 cout << "your name is " << userName << endl;

//init a const variable

intconstmyAgeToday(29);
 string constmyName("Max");

//use cmath example

int result = 16;
int newResult = sqrt(result);
 cout << "sqrt of 16 : " << newResult << endl;

return0;
}