João João - 1 year ago 122
C++ Question

error function not declared in scope

I'm trying to log a few values to a text file, but everytime I do it, it gives me this error:

[Error] 'save' was not declared in this scope

Here's the code:

#include "iostream"
#include "fstream"

using namespace std;
double n1, n2;

int main()

n1 = 1;
n2 = 2;
save(n1, n2)

int save(double a, double b)
ofstream log;"test.txt");
log << 1 << 2 << "\n";

I'm new to C++ and programming in general, please explain in an easy way.


Answer Source

Code in main needs to know that such a function exists. It needs either a declaration or a definition above it:

int save(double a, double b);

int main() //...

By the way: you should eschew using global variables. And you're not using the parameters in your save function.

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