Explain the switch construct, C/C++ Programming

Assignment Help:

The Switch Construct

The switch statement is a multi-way decision-making construct that tests an expression matches one of a number of constant values, and branches accordingly. The switch statement is another alternative to using nested if-else statements. The general format is as follows :

                switch(expression)

                 {

 

                                case value1 : statements;

                                                                                :

                                                                                :

                                                                   break;

 

                                case value2 : statements;

                                                                                :

                                                                                :

                                                                   break;

 

                                case value3 : statements;

                                                                                :

                                                                                :

                                                                   break;

 

                                default     : statements;

                                :                                                                                              

:

                 }

 

The expression must be declared in the parentheses, and the body of the switch statement must be enclosed in braces. The values with case should be constants. The expression is evaluated and compared with the values in cases; if it matches the statements under it are implemented till it encounters a break statement. If the value does not match with any of the case statements then the statements under the default label are implemented.

Omission of break takes control by the next case statements regarded whether the value of case matches or not. This can also be used constructively when similar operation has to be performed on a number of cases.

 

e.g.

 

                switch(ch)

                 {

 

                                case 'a' :

                                case 'e' :

                                case 'i' :

                                case 'o' :

                                case 'u' : cout << "Vowel";

default  : cout << " Consonant ";

                 }

 

In  the above example if the value of ch is any of a,e,i,o,u then they are printed as vowels , or else they are printed as consonants

 


Related Discussions:- Explain the switch construct

Smuggler, Smugglers are becoming very smart day by day. Now they have devel...

Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new technology, they are send

What are the precautions with function overloading, Precautions with functi...

Precautions with function overloading Function overloading is a boon to designers, since dissimilar names for same functions need not be thought of, which often is a cumbersome

Virtual constructor, Is it possible to have Virtual Constructor? If yes, ho...

Is it possible to have Virtual Constructor? If yes, how? If not, Why not possible?

Get reverse engineer to linux game routine analysis, Get Reverse Engineer t...

Get Reverse Engineer to Linux game routine analysis Project Description: I want a fast and efficient reverse engineer with good knowledge of assembly x86 language, strong rev

Inline functions, Inline functions, C++ provides inline functions to help r...

Inline functions, C++ provides inline functions to help reduce function_call overhead especially for small functions. The qualifier inline before function's return type in the f

Area under the curve, program area under the curve y=f(x) between x=a & y=b...

program area under the curve y=f(x) between x=a & y=b, integrate y=f(x) between the limits of a & b   Solution: #include float    start_point,            /* GLOBAL V

Draw pie chart in c++ program, Draw pie chart in c++ program: int main...

Draw pie chart in c++ program: int main() {                 char cmd;                   cout                 cout                 cmd = toupper(getch());

Described c++ storage classes?, A: auto: the default. Variables are created...

A: auto: the default. Variables are created and initialized automatically while they are defined and destroyed at the ending of the block containing their definition. They are not

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd