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C++ nested switch statements
It is possible to have a switch as part of the statement sequence of an outer switch. Even if the case constants of the inner and outer switch contain common values, no conflicts will arise.
C++ specifies that at least 256 levels of nesting be allowed for switch statements.
Syntax:
The syntax for a nested switch statement is as follows:
switch(ch1) {
case 'A':
cout << "This A is part of outer switch";
switch(ch2) {
case 'A':
cout << "This A is part of inner switch";
break;
case 'B': // ...
}
break;
case 'B': // ...
}
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Example:
#include <iostream>
using namespace std;
int main ()
{
// local variable declaration:
int a = 100;
int b = 200;
switch(a) {
case 100:
cout << "This is part of outer switch" << endl;
switch(b) {
case 200:
cout << "This is part of inner switch" << endl;
}
}
cout << "Exact value of a is : " << a << endl;
cout << "Exact value of b is : " << b << endl;
return 0;
}
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This would produce following result:
This is part of outer switch
This is part of inner switch
Exact value of a is : 100
Exact value of b is : 200
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