Question

1)Write a program that asks a user for a number. If (and only if) the number is greater than zero print “The number is valid”

2)Write a program that asks a user for a grade. If (and only if) the grade is greater than zero and less than 101, print “The grade is valid”

3)Write a program that asks a user how many widgets they want to buy and prints out what the user should pay. Widgets costs 10 dollars. Use the discount table below:

Example: If the user enters 15, they should pay 15*10 – (5/100)*15*10 = 142.50 dollars

Quantity	Discount
1-10	No Discount
11-20	5%
21-50	10%
Above 50	15%

4)Ask a user to input two numbers and print out the smaller number. If the numbers are equal, print out that the numbers are equal.

Answer 1

1)

Progarm :

#include <iostream>
using namespace std;
int main()
{
int number; // variable declaration
cout << "Enter a number : ";
cin>>number; // Accept number
if(number>0) // check number is greater than 0
cout << "The number is valid" << endl;
else
cout << "The number is invalid" << endl;
return 0;
}

Output :

2)

#include <iostream>
using namespace std;
int main()
{
int grade; // variable declaration
cout << "Enter a grade : ";
cin>>grade; // Accept grade
if(grade>0&&grade<101) // check grade in between 0-101
cout << "The grade is valid" << endl;
else
cout << "The grade is invalid" << endl;
return 0;
}

Output :