Im not too good at C++, plus, I am not good at anything. Anyways, I am trying to make a prog that takes a number from the user and then adds all the numbers that lead up to it together. For example
cin>>5 (num)
This is the part I dont know how to do. I know i have to use a loop, and I know how to make it count up to the number, but how do i get it to take the number it gets and put it in some kind of queue that will be added up later (0+1+2+3+4+5)?
cout<<15 (sum)
any help would be great.
If all you're doing is adding all of the numbers before the number entered then you can easily do this with a simple loop.
Code:int total; for ( int i = 0; i < num; i++ ) { total += i; } cout << total;
pointer = NULL
This can be made into a function. Here is one solution.Code:#include<iostream.h> int main() { int num; int sum = 0; cout << "Enter a number: "; cin >> num; while(num > 0) { sum += num; --num; } cout << "Sum is: " << sum << endl; return 0; }
ok, i understand now, i didnt know about that += what is that?
total += i
is the same as
total = total + i
It's just one of those short-hand things that makes life easier. You can use that "trick" for any normal operator, like:
total -= i; (total = total - i; )
total *=i; (total = total * i; )
total /=i; (total = total / i; )
Last edited by DanMan; 10-16-2001 at 03:40 PM.
ahh, i see
