
Sum of numbers
The purpose of this program is to display the sums of all of the numbers from one to the input number. Example if i enter 5 i want it to add the numbers 1+2+3+4+5 = 15 or if i enter 225 it will add 1+2+.....225
Here is what i am working with
insert
Code:
#include <iostream.h>
void main()
{
int Number, Sum;
Sum = 0;
cout << "Enter a number: " << endl;
cin >> Number;
while (Number >= 0)
{
Sum = Sum + Number;
cout << "Current Total " << Sum << endl;
cout << "Enter a number: " << endl;
cin >> Number;
}
cout << "The total is " << Sum << endl;
}
It works fine when i go in order 1+2+3+.....10 but it does not add all i need.
Any hints will help thanks in advance.

Instead of asking for a new number, you should be subtracting one from the number.

Code:
std::cout << (Number*(Number+1)/2) << std::endl;
:)
or, if you want to learn programming, consider two loops. I am going to write the outer loop for you, because this is a good habit to get into early while you are learning
Code:
while(std::cin >> Number && Number > 0) {
int Sum = 0;
for(....)
std::cout << Sum;
}
This solves a lot of common bugs, first off realize that && is left to right, so the left hand side gets evaluated first, the right hand side is evaluated only when the left is true. The result of a stream input operation, is a stream. This is what lets you do cin >> a >> b; If you evaluate a stream in a boolian context it is true only if all the operations prior to this have been successful. If someone inputs 15, and then a letter your program loops forever, when done this way it exits.

Not trying to suggest that you don't sum up those numbers, but the formula:
y = x*(x+1)/2 gives the sum you are calculating.
You can at least use that to check that your answers are correct.