Question

i am new to using c++

When I execute the following code

i am aware it shouldn’t draw anything at the moment i am just trying to change from using an array for vertex position to using a vector as i want to be able to calculate points then use a push_back to append them.

This minimal example won’t compile:

#include <vector>

std::vector<float> vertexPositions;

const float triangle = 0.75f;

vertexPositions.push_back(triangle);

int main(int argc, char** argv)
{
    return 0;
}

I get:

error: ‘vertexPositions’ does not name a type

Answer 1

vertexPositions.push_back(triangle); is a statement. It must be placed inside a function definition. It can not be placed in the global scope like that.

Move that line into for example main, and you should be fine.