please when I run this code, it produces an error message: timeout: monitored command dumped... For some test cases.

Question

#include <iostream>
using namespace std;

int main() {
int size = 0;
int array[size];
int sum = 0;
cin >> size;
for(int i = 0; i < size; i++)
{
cin >> array[i];
}
for(int j = 0; j < size; j++)
{
if(array[j] % 2 == 0)
{
sum += array[j];
}
else
{
continue;
}
}
cout << sum;
return 0;
}

Answer 1

Your program is executed from top to bottom. What do you expect to happen at runtime if you first declare an array with "size" (which equals 0 at that point) elements and only later actually request a concrete value for "size"? You first need to get the value from the input stream before operating on/ with the variable it is stored in.

Also note VLA's are only compiler-specific extensions to the language and not standard C++. Using dynamic memory allocation or better std::vector<> might be more preferable.

Answer 2

thank you very much. I've learned something new. It worked like a charm