just practice

This is a discussion on just practice within the C++ Programming forums, part of the General Programming Boards category; I dont understand why the 2 errors. Code: #include <iostream> #include <string> using namespace std; char choice; void M(); void ...

  1. #1
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    just practice

    I dont understand why the 2 errors.
    Code:
    #include <iostream>
    #include <string>
    using namespace std;
    
    char choice;
    void M();
    void C();
    void Process();
    
    void M(){
    	cout <<"Multiplication\n";
    }
    void C(){
    	cout << "Calculation\n";
    }
    void Process(){
    	cout << "Make a choice\n"
    		<< "C or M only\n";
    	cin >> choice;
    	while (strcmp(choice, "M")!=0) || (strcmp(choice, "C")!=0){
    		cout << "ERROR Enter again";
    	cin >> choice;
    	
    	}
    	return;
    }
    
    
    void main () {
    	Process();
    	while (strcmp(choice, "M") == 0){
    		M();
    	}
    	return;
    	while (strcmp(choice, "C") == 0){
    		C();
    		return ;
    	}
    	
    }
    Any idea?

  2. #2
    and the hat of wrongness Salem's Avatar
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    What errors?

    Apart from main returning void, and the excess of return statements which result in unreachable code.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  3. #3
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    When I run it, it returns two errors and I dont understand the debug.
    Could you be a bit more specific? thanks

  4. #4
    Registered User hk_mp5kpdw's Avatar
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    One thing is your variable choice is a char and you are using strcmp for comparison. You would do better to compare using this way:
    Code:
    while ( choice != 'M' && choice != 'C' ){
    Make the changes in the other two places as well.

    [edit]Also, if you do intend to use any of the C-style string routines I suspect you meant #include <cstring> and not #include <string>[/edit]
    Last edited by hk_mp5kpdw; 05-27-2004 at 07:11 AM.
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

  5. #5
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    Oh, I get it... I can only use strcmp with strings, right?

    It works now, thanks.

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