C++ lecture 7

C++ Programming Lecture Control Structure I (Selection) – Part II The Hashemite University Computer Engineering Department (Adapted from the textbook slides) Outline    Introduction switch statement Examples The Hashemite University Introduction     In this lecture we will study the last control structure in C++ This control structure is associated with selection It is used when there are multiple selection choices, i.e more than It can be used instead of nested if/else structure The Hashemite University The switch MultipleSelection Structure  switch    switch (variable or expression) Useful when variable or { expression is tested for multiplecase value1: //do something; values break; case value2: //do Consists of a series of case labels and an optional default something; break; case case value3: //do Used instead of nested if/else something; break; statements to make the code case value4: //do something; more readable and easier to break; trace default: // something The Hashemite University break; Flowchart Representation of switch case a true case a action(s) break case b action(s) break case z action(s) break false case b true false case z true false default action(s) The Hashemite University 5 10 11 12 13 14 15 16 17 18 19 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 // Fig 2.22: fig02_22.cpp // Counting letter grades #include using std::cout; using std::cin; using std::endl; int main() { char grade, aCount = bCount = cCount = dCount = fCount = 0, 0, 0, 0, 0; // one grade // number of A's // number of B's // number of C's // number of D's // number of F's cout