Thread: Im having a trouble at subtracting a number that contains 3 in a c++ loop

  1. #1
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    Im having a trouble at subtracting a number that contains 3 in a c++ loop

    so i am having a trouble in subtracting a number that contains 3 in c++ i just couldnt get it right maybe you can help me in analyzing

    code:
    Code:
    #include<iostream>
    #include<conio.h>
    using namespace std;
    int main()
    {
    	int integer, sum=0;
    	cout<<"Enter an integer: ";
    	cin>>integer;
    	for (int i = 1; i <= integer; ++i) 
    	{	 
    		sum += i;
    		
    		if(i==33 || i%10 == 3)
    		{
    			i = sum - i;
    		}
    		
        }
    
    
        cout << "  The Sum is = " << sum;
    
    
        getch();
        return 0;
    }

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
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    > i = sum - i;
    Well the questions you need to answer are
    - what are you subtracting
    - what are you subtracting it from

    > so i am having a trouble in subtracting a number that contains 3
    Sure, you have the "contains 3" bit sorted out, but then what?
    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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