Finding Errors

[ZLAPQM]

Original:
https://i.imgur.com/h1wZgHa.png

Objective:
sum all entered int values that are greater than 5

This is what I came up with:

#include <iostream>
using namespace std;

int main() {
    int x, sum;
    while (x < 10) {
        cin >> x;
        if (x > 5)
            sum == sum +x;
    }
    cout << "" << sum <<endl;
}

No matter what I input, nothing shows up on the output.
What errors did I miss/overlook?

[Ganado]

Few issues.

In function 'int main()':
9:17: warning: statement has no effect [-Wunused-value]
6:14: warning: 'x' is used uninitialized in this function [-Wuninitialized]
11:19: warning: 'sum' is used uninitialized in this function [-Wuninitialized]

(1) you must initialize a variable, it is not automatically 0.

int x = 0;
int sum = 0;

(2) == tests for equality
= is the assignment operator.

Change line 9 to sum = sum + x;

(You actually somehow managed to do the opposite of what almost every new programmer gets confused on. Usually people accidentally put = where they ought to put ==. I'm actually impressed.)

Anyway, here's what your program would look like fixed. Try to study it to learn.

#include <iostream>
using namespace std;

int main() {
    int x = 0;
    int sum = 0;
    
    while (x < 10) {
        cin >> x;
        if (x > 5)
            sum = sum + x;
    }
    cout << sum << endl;
}

example:

4
5
6
7
8
9
10
40 <-- sum =  6 + 7 + 8 + 9 + 10

Your program is a bit ambiguous, though. Nowhere does it say it should stop summing after summing including the first number 10 or greater. Or is your intention to run the a loop exactly 10 times?

[ZLAPQM]

If I needed to modify this program to sum up the integers of the input, (ex. {1,2,3,-3,2,1} )
would I use an array or string to hold these values?

[Ganado]

If you needed to hold the values, you would use an array of type int, or in modern C++, usually an std::vector<int>.

#include <iostream>
#include <vector>

int main()
{
    std::vector<int> arr;
    const int num_inputs = 10;
    for (int i = 0; i < num_inputs ; i++)
    {
        int n;
        std::cin >> n;
        arr.push_back(n);
    }

    int sum = 0;
    for (size_t i = 0; i < arr.size(); i++)
        sum = sum + arr[i];

    std::cout << sum << std::endl;
}