dsa-programs/Lecture30.cpp at main · Aadharbindal/dsa-programs · GitHub

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//                                           macro

#include<iostream>
using namespace std;

#define PI 3.14

int main() {

    int r = 5;
    //double pi = 3.14;

    double area = PI * r * r;

    cout << "Area is " << area << endl;

    return 0;
}
//                                          inline function

#include<iostream>
using namespace std;

inline int getMax(int& a, int& b) {
    return (a>b) ? a : b;
}

int main() {

    int a = 1, b = 2;
    int ans = 0;

    ans = getMax(a,b);
    cout << ans << endl;

    a = a + 3;
    b = b + 1;

    ans = getMax(a,b);
    cout << ans << endl;

    return 0;
}
//                                            global varuiable

#include<iostream>
using namespace std;

inline int getMax(int& a, int& b) {
    return (a>b) ? a : b;
}

int main() {

    int a = 1, b = 2;
    int ans = 0;

    ans = getMax(a,b);
    cout << ans << endl;

    a = a + 3;
    b = b + 1;

    ans = getMax(a,b);
    cout << ans << endl;

    return 0;
}
//                                                  default argument

#include<iostream>
using namespace std;

// the game of default agrument is laways starts from right most part of the function or code to left part

void print(int arr[], int n  , int start = 0) {

    for(int i = start; i<n; i++) {
        cout << arr[i] << endl;
    }

}

int main() {

    int arr[5] = {1,4,7,8,9};
    int size = 5;

    print(arr, size);
    cout << endl;
    print(arr, size, 2);

    return 0;
}

// constant variables pending