C++

     // A shop will give discount of 10% if the cost of purchased items is equal to 1000 or more. // Each item in shop costs Rs.100 // Ask user for quantity of items he got. // Judge and print total cost for user (with discout deducted if any). #include <iostream> using namespace std ; int main (){     int quantity , gross , net , discount ;         cout << "Enter the quantity of items: " ;         cin >> quantity ;         gross = quantity * 100 ;             if ( gross >= 1000 ){                 discount = gross * 0.1 ;                 net = gross - discount ;                 cout << "Total payable amount: Rs." << net << endl <<                   ...

    // A company decided to give bonus of 5% to employee if his/her year of service is less than 5 years, // and 10% if more than 5 years. // Ask user for their salary and year of service and print the net bonus amount. #include <iostream> using namespace std ; int main (){         int salary , year , annual_sal , bonus , bonus5 ;             cout << "Enter your monthly salary: Rs." ;             cin >> salary ;             cout << "Enter your years of service: " ;             cin >> year ;             annual_sal = salary * 12 ;             if ( year >= 5 ){                 bonus5 = 0.1 * annual_sal ;                 cout << "You got bonus of R...

    // Write a program that takes an integer as input and prints whether it is even or odd #include <iostream> using namespace std ; int main (){         int num ;         cout << "Enter the number: " ;         cin >> num ;                     if ( num % 2 == 0 ){             cout << "The number is 'even' \n \n " ;}                         else cout << "The number is 'odd' \n \n " ;                 cout << "Now you have your answer \n " ;         return 0 ; } Input 1: Enter the number: 54 Output 1: The number is 'even' Now you have your answer   Input 2: Enter the number: 67 Output 2: The number is 'odd' Now you have your answer

   // Write a program that takes salary amount from the user and applies tax to it. // If salary is greater than 100000 deduct 10% tax otherwise deduct 5%. // Print the net salary, and amount of tax deducted. #include <iostream> using namespace std ; int main (){         float gross_salary , five_tax , ten_tax , net_sal_five , net_sal_ten ;         cout << "Enter your monthly gross salary: Rs." ;         cin >> gross_salary ;             if ( gross_salary >= 100000 ){                 ten_tax = gross_salary * 0.1 ;                 net_sal_ten = gross_salary - ten_tax ;                 cout << "Your net salary is: Rs." << net_sal_ten << endl <<                   ...

  // Write a program that takes three sides of a triangle from the user and // print if the triangle is equilateral or isosceles. #include <iostream> using namespace std ; int main () {         float numa, numb, numc;                     cout << "Enter first side length: " ;             cin >> numa;                         cout << "Enter second side length: " ;             cin >> numb;                         cout << "Enter third side length: " ;             cin >> numc;                             if (numa==numb&&numb==numc)                 { ...

  #include <iostream> using namespace std ; int main (){     float vi , t , a ;     cout << "Enter the value of initial velocity (in meter per second) = " ;     cin >> vi ;     cout << "Enter the value of time (in seconds) = " ;     cin >> t ;     cout << "Enter the value of acceleretion (in meter per square second) =" ;     cin >> a ;     float d = vi * t + 0.5 * a * t * t ;     cout << "The distance thus obtained is = " << d ;     return 0 ; } Input: Enter the value of initial velocity (in meter per second) = 2.5 Enter the value of time (in seconds) = 5 Enter the value of acceleretion (in meter per square second) = 1.75 Output: The distance thus obtained is = 34.375

  #include <iostream> using namespace std ; int main (){     float matric_obt , matric_outof ;     cout << "Marks you obtained in Matric = " ;     cin >> matric_obt ;     cout << "out of = " ;     cin >> matric_outof ;     float matric = matric_obt / matric_outof * 10 ;     float inter_obt , inter_outof ;     cout << "Marks you obtained in Intermediate = " ;     cin >> inter_obt ;     cout << "out of = " ;     cin >> inter_outof ;     float inter = inter_obt / inter_outof * 40 ;     float mcat_obt , mcat_outof ;     cout << "Marks you obtained in MDCAT = " ;     cin >> mcat_obt ;     cout << "out of = " ;     cin >> mcat_outof ;     float mdcat = mcat_obt / mcat_outof * 50 ;     float aggregate = matric + int...

  #include <iostream> using namespace std ; main (){     int father , mother ;     cout << "Father gave Ali rupees= " ;     cin >> father ;     cout << "Mother  gave Ali rupees= " ;     cin >> mother ;     int total = father + mother ;     cout << "Ali have total=" << total << "rupees" ;     return 0 ; } Input: Father gave Ali rupees= 500 Mother  gave Ali rupees= 678 Output: Ali have total= 1178rupees

#include <iostream> using namespace std ; main (){     int a;     cout<< "The size of int is " << sizeof (a)<<endl;     float b;     cout<< "The size of float is " << sizeof (b)<<endl;     char c;     cout<< "The size of char is " << sizeof (c)<<endl;     double d;     cout<< "The size of double is " << sizeof (d)<<endl;     bool e;     cout<< "The size of bool is " << sizeof (e)<<endl;     return 0 ; } Output:     The size of int is 4           The size of float is 4         The size of char is 1           The size of double is 8         The size of bool is 1 Thus:     The size of int is 4 byte           The size of float ...

  // Take full name ====>(with spaces)<==== as input and print it #include <iostream> using namespace std ; int main (){         string name ;         cout << "Enter your full name: " ;         getline (cin >> ws, name );     // Use ws to avoid input buffer             cout << "Your name is: " << name << endl ;     return 0 ; } Input:     Enter your full name: Muhammad Umar Chaudhry Output:     Your name is: Muhammad Umar Chaudhry

    // Take name ===>(without spaces)<=== and print it. #include <iostream> using namespace std ; int main (){     string name ;     cout << "Enter the name: " ;     cin >> name ;     cout << name ;     return 0 ; } Input:     Enter the name: Umar Output:     Umar

  Keywords:                   Keywords are  reserved words whose meaning is already known to the compiler  and they can not be used elsewhere in the program for naming a variable or a function.  ==> List of C++ keywords is:  https://en.cppreference.com/w/cpp/keyword Constants: Constants are very similar to a variable and they can also be of any data type. The only difference between a constant and a variable is that a  constant’s value never changes . Types of constants:          There are three types of constants:    Integer Constants  ===================>    -1,    6,    7,    9  (all non-fraction numbers)    Real Constants  =====================>    -30.1,     2.5,    7.0   (all fraction numbers)    Character Constants  ==============...