Re: Please explain.
"D" <poepoe12002@yahoo.com> schreef in bericht
news:1161822361.273619.134680@i3g2000cwc.googlegroups.com...
Can someone explain to me why the first example works and the following
two modifications do not. Thanks, D
char switchTest(void){
char c = 0;
cout << "Enter letter: " << endl;
cin >> c;
This actualy reads:
cin.operator>>( char& c );
As you can see it does not return a char value, it fills the char passed as
a reference parameter.
The return value is the stream itself so you can chain extraction operations
together.
switch(c){// Compiles fine. I assume because conversion occured
case 'q' : return 'q';
default : return 'd';
}
return 0;
}
// Change 1
...
switch(cin >> c){
switch expect an integer value, the return value of (cin>>c) however is an
ostream&.
...
// Here I get: Error: Switch quantity not an integer
// I assumed that whatever happened -
// above would happen here to. Wrong.
// Change 2
...
switch(int(cin >> c)){
There is no sensible way to convert an ostream& to an integer so the
compiler
refuses your polite request.
...
// Here I get: Error: Invalid -
// conversion from 'void*' to'int'. What void* ???
// I figured I would force the issue. But no way.
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