Basic Variables

int main() {
    int age;    //declare
    age = 20;   //initialise
    cout << "age: " << age << endl;
    return 0;
}
                    

int main() {
    int age = 20;   //declare & initialise
    cout << "age :" << age << endl;
    return 0;
}
                    

int main() {
    int age;   //declare
    cout << "age: " << age << endl;
    return 0;
}
                    

int main() {
    int odd = 1;
    int even = 2;
    int prime = 3;
    return 0;
}
                    

int main() {
    string fruit = "apple";
    float mass = 102.6;
    double calories = 52.05
    int quantity = 10;
    long batchNum = 398154;
    return 0;
}
                    

int main() {
    int id = 1;    //declare & initialise
    cout << "id: " << id << endl;
    id = 2;    //assign
    cout << "id: " << id << endl;
    return 0;
}
                    

int main() {
    string name = "Bob";
    int age = 21;
    int phoneNumber = 1111111;
    name = "Bob Jones";
    phoneNumber = 2222222;
    return 0;
}
                    

int main() {
    string name = "Bob";
    int age = 20;
    string bobsName = name;
    int bobsAge = age;
    name = "Bob Jones";
    return 0;
}
                    

int main() {
    string name = "Bob";
    int age = 20;
    string &bobsName = name;
    int &bobsAge = age;
    return 0;
}
                    

int main() {
    string name = "Bob";
    string &bobsName = name;
    cout << "name: " << name << endl;
    cout << "bobsName: "  << bobsName << endl;
    bobsName = "Bob Jones";
    cout << "name: "  << name << endl;
    cout << "bobsName: "  << bobsName << endl;
    return 0;
}
                    

int main() {
    int bobHomePhone = 1234567;
    int bobMobilePhone = 0211234567;
    int *aliceHomePhone = &bobHomePhone;
    return 0;
}
                    

int main() {
    int odd = 3;
    int *prime = &odd;
    cout << "addr in prime var:" << prime << endl;
    cout << "*prime val:" << *prime << endl;
    *prime = 5;
    cout << "odd val:" << odd << endl;
    cout << "addr in prime var:" << prime << endl;
    cout << "*prime val:" << *prime << endl;
    return 0;
}
                    

int main() {
    string colour1 = "red";
    string colour2 = "blue";
    string *favCol = &colour1;
    cout << "addr in favCol var:" << favCol << endl;
    cout << "*favCol val:" << *favCol << endl;
    favCol = &colour2;
    cout << "addr in favCol var:" << favCol << endl;
    cout << "*favCol val:" << *favCol << endl;
    return 0;
}