having problem with string statement during a loop!

This is a discussion on having problem with string statement during a loop! within the C++ Programming forums, part of the General Programming Boards category; I'm using a string during a loop and for some reason when the loop repeats it puts the "enter name ...

  1. #1
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    having problem with string statement during a loop!

    I'm using a string during a loop and for some reason when the loop repeats it puts the "enter name : " statement and "enter first number : " on the same line for example: "enter name: enter 1st number:".
    I want them on seperate lines. I was going to use fflush(stdin) to fix this problem but after reading the FAQ on this board I had second thoughts. Is there another way around this problem or did I write the code wrong?

    And how do I use code tags? there is an option to close current tag and close all tags but for some reason I can't get it to work?I have no experience with HTML


    [

  2. #2
    Senior Member joshdick's Avatar
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    Code:
    cout << "Enter name: ";
    cin >> name;
    cout << endl
         << "Enter first number: ";
    cin >> first_number;
    To use code tags, put all your code between [co de] Code goes here [/co de], except, of course, omit that space so that "code" is one solid word.

  3. #3
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    I inserted the solution but i still get the same problem, I have listed the code to show you my problem (by the way thanks for showing me how to use the code tags).


    BEFORE
    Code:
    #include <iostream>
    #include <string>
    using namespace std;
    
    int main()
    {
    			// declaration of variables
    			string name2 = "NONE";
    			string name  = " ";
    			int num1     = 0;
    			int num2     = 0;
    			int answer   = 0;
    		
    			cout << "Enter name: ";
    			getline(cin, name);
    			cout <<endl;
    		
    		 while (name != "NONE")
    		{
    			
    			cout << "enter 1st number: ";
    			cin >> num1;
    			cout << "Enter 2nd number: ";
    			cin >> num2;
    
    			// Processing area of program
    			answer = num1 + num2;
    
    			// Output area of program
    			cout << "Answer is: " << answer << endl;
    			cout << endl;
    			cout << "Enter next name: ";
    			getline(cin, name);
    			
    		} //end if
    
    
    	return 0;
    }
    
    
    /*
    Enter name: NONE
    Press any key to continue
    */
    
    
    /*Enter name: xxxxx
    enter 1st number: 3
    Enter 2nd number: 8
    Answer is: 11
    
    enter name: enter 1st number  _ promts here
    */
    AFTER
    Code:
    #include <iostream>
    #include <string>
    using namespace std;
    
    int main()
    {
    			// declaration of variables
    			string name2 = "NONE";
    			string name  = " ";
    			int num1     = 0;
    			int num2     = 0;
    			int answer   = 0;
    		
    			cout << "Enter name: ";
    			getline(cin, name);
    		
    		
    		 while (name != "NONE")
    		{
    			
    			cout << "enter 1st number: ";
    			cin >> num1;
    			cout << "Enter 2nd number: ";
    			cin >> num2;
    
    			// Processing area of program
    			answer = num1 + num2;
    
    			// Output area of program
    			cout << "Answer is: " << answer << endl;
    			cout << endl;
    			cout << "Enter next name: ";
    			getline(cin, name);
    			cout << endl;
    			
    		} //end if
    
    
    	return 0;
    }
    
    
    /*
    Enter name: xxxxxx
    enter 1st number: 21
    Enter 2nd number: 21
    Answer is: 42
    
    Enter next name:
    enter 1st number  _  promts here
    */

  4. #4
    Senior Member joshdick's Avatar
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    When you use the stream extraction operator, white space like ' ' and tabs and newlines are removed from or ignored by the stream.

    getline(), however, reads until a newline is reached. But, that newline remains in the input buffer. To get rid of that newline, you can use the ignore() function.

  5. #5
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    for a more detailed discussion of joshdicks answer, if you want it, you can read the responses here:


    Need help with structures
    You're only born perfect.

  6. #6
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    Well I tried what ya'll suggested and it works great! . Did I insert the ignore() function in its proper place or should I leave it just where it is?

    Code:
    			cout << "Enter name: ";
    			getline(cin, name);
    			
    		
    		 while (name != "NONE")
    		{
    			
    			cout << "enter 1st number: ";
    			cin >> num1;
    			cout << "Enter 2nd number: ";
    			cin >> num2;
    
    			// Processing area of program
    			answer = num1 + num2;
    
    			// Output area of program
    			cout << "Answer is: " << answer << endl;
    			cout << endl;
    			cout << "Enter next name: ";
    			cin.ignore();
    			getline(cin, name);
    		
    			cout << endl;
    			
    		} //end if
    
    
    	return 0;
    }
    
    
    /*
    Enter name: xxxxx
    enter 1st number: 23
    Enter 2nd number: 23
    Answer is: 46
    
    Enter next name: xxxxxx
    
    enter 1st number: 23
    Enter 2nd number: 23
    Answer is: 46
    
    Enter next name: NONE
    
    Press any key to continue
    */

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