Gas Pump
A gas pump calculates the cost of gas at a local gas station. The station charges $ 2.69 per gallon for regular grade gas, $ 2.79 per gallon for special grade gas and $ 2.89 per gallon for super grade gas. Create an application that simulates the functionality of the gas pump. The user enters the number of gallons to purchase and clicks the desired grade (each grade is represented by a Button whose Text properties are set to Regular, Special and Super). Each Button's Click event handler calls a method to compute the total cost from the number of gallons entered and the selected grade.
Computer- Assisted Instruction
The use of computers in education is referred to as computer assisted instruction ( CAI). Write a program that will help an elementary school student learn multiplication. Use a Random object to produce two positive one- digit integers. The program should then prompt the user with a question, such as How much is 6 times 7? The student then inputs the answer. Next, the program checks the student's answer. If it's correct, display the message " Very good!" and ask another multiplication question. If the answer is wrong, display the message " No. Please try again." and let the student try the same question repeatedly until the student finally gets it right. A separate function should be used to generate each new question. This function should be called once when the application begins execution and each time the user answers the question correctly.