Adding an array using a For loop

[C++Noob316]

I need to add the elements of an array together using a for loop and then print the result. I know it is a simple code but I am struggling with it. Can anyone offer any advice on this?

[laserlight]

What have you tried?

[prog-bman]

For Loop Example:

for(int i = 0; i < ARRAY_SIZE; i++){
}

[C++Noob316]

I'm kinda stuck at the starting point (I'm just learning this stuff). I know the basic code structure but I am struggling with the body of it. The basic structure of the for loop does help. For instance, say you had to add together 1,2,3 and 4 using a for loop. What would that look like?

[laserlight]

Well, suppose you have two variables, sum and x. To add x to sum, you would write:

sum += x;

[C++Noob316]

So for multiple variables, say x, y, z, it would be like this?: x+=y+=z;

[laserlight]

Nope, unless you intend to add z to y as well. In this case you are summing the elements of an array, one at a time.

[C++Noob316]

Oh ok. So it would be: sum += x ; Where x is just the name of the array?

[laserlight]

No, where x is the current element of the array, i.e., you would replace x with say, y[i], where y is the array name and i is the array index.

[Elkvis]

http://lmgtfy.com/?q=loop+to+find+th...+array+c%2B%2B

[C++Noob316]

Elkvis- I appreciate it but Googling it is what led me this forum in the first place

[Sentral]

You could need to declare a variable to hold the sum , ie. int sum=0;

Then use a for loop to go through the elements of the array, and add it to sum.

As such,

for(int i=0; i < array_size; i++)
     sum=sum + myarray[i]; //or sum += myarray[i]

cout << sum;

All this is doing is accessing the element of the array, and adding it to the value in sum, so you get the total of the array.