Problem compiling files that store functions
I'm at a chapter on C++ where it teaches how to create a function and how codes can be separated into several files. Well, in a file that define a function in it, I'm having a problem compiling (actually, I have problems compiling for all of them). I believe I copy the codes correctly. Anyway, when I try to compile my file, I would get this error:
Code:
C:\Program Files\CodeBlocks\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\libmingw32.a(main.o):main.c:(.text+0x104)||undefined reference to `_WinMain@16'|
||=== Build finished: 1 errors, 0 warnings ===|
As the error message should indicate, I'm using Code::Blocks IDE.
Anyway, this is one of the files I'm trying to compile:
The header named median.h
Code:
#ifndef GUARD_median_h
#define GUARD_median_h
// median.h--final version
#include <vector>
double median(std::vector<double>);
#endif
And here's the part of the code in a file named median.cpp
Code:
#include <algorithm>
#include <stdexcept>
#include <vector>
#include "median.h"
using std::domain_error; using std::sort; using std::vector;
//compute the median of a vector<double>
double median(vector<double> vec)
{
typedef vector<double>::size_type vec_sz;
vec_sz size = vec.size();
if (size == 0)
throw domain_error("median of an empty vector");
sort(vec.begin(), vec.end());
vec_sz mid = size/2;
return size % 2 == 0 ? (vec[mid] + vec[mid-1]) / 2 : vec[mid];
}
I tried adding int main() after a bit of google, but I received a different error instead...
What am I doing wrong?
