Ivor Horton's Beginning Visual C++ 2012

SUMMARY

In this chapter, you learned all the essential mechanisms for making decisions in C++ programs. The ability to compare values and change the course of program execution is what differentiates a computer from a simple calculator. You need to be comfortable with all of the decision-making statements I have discussed because they are all used very frequently. You have also gone through all the facilities for repeating a group of statements. Loops are a fundamental programming technique that you will need to use in every program of consequence that you write. You will find you use the for loop most often in C++, closely followed by the while loop.

EXERCISES

1. Write a program that reads numbers from cin and then sums them, stopping when 0 has been entered. Construct three versions of this program, using the while, do-while, and for loops.

2. Write a program to read characters from the keyboard and count the vowels. Stop counting when a Q (or a q) is encountered. Use a combination of an indefinite loop to get the characters, and a switch statement to count them.

3. Write a program to print out the multiplication tables from 2 to 12, in columns.

4. Imagine that in a program you want to set a ‘file open mode’ variable based on two attributes: the file type, which can be text or binary, and the way in which you want to open the file to read or write it, or append data to it. Using the bitwise operators (& and |) and a set of flags, devise a method to allow a single integer ...