operationsWithNums.cpp

#include <iostream>

using namespace std;

int main() {

    int n=10; //assigns value 10 to integer variable n. 

    cout << "n is "<<n<<endl; //outputs string "n is " followed by 10

    n--; //subracts one from n

    cout<<"n is now "<<n<<endl; //outputs string "n is now " followed by 9

    n++; //adds one to n

    cout<<"n is now "<<n<<endl; //outputs "n is now " followed by 10

    return 0; //exits program

}

OUTPUT:

[cms-opendata@localhost src]$ ./a.out

n is 10

n is now 9

n is now 10