expected unqualified-id before string constant

Question

I'm currently writing a C++ application which implements an Oscillator in conjuction with math.h. The code I have should work fine for the application (trying to compile an object file), bu I'm getting a compiler error most likely having to do with syntax/etc; I think it has something to do with namespace. The error:

Terminal Output:

User-Name-Macbook-Pro:Synth Parts UserName$ make g++ -o Oscillators.o -c -I. Oscillators.cpp -c In file included from Oscillators.cpp:2: /usr/include/math.h:41: error: expected unqualified-id before string constant In file included from /usr/include/c++/4.2.1/bits/locale_facets.tcc:42,              from /usr/include/c++/4.2.1/locale:46,              from /usr/include/c++/4.2.1/bits/ostream.tcc:46,              from /usr/include/c++/4.2.1/ostream:635,              from /usr/include/c++/4.2.1/iostream:45,              from Oscillators.cpp:4: /usr/include/c++/4.2.1/typeinfo:41: error: expected declaration before end of line make: *** [Oscillators.o] Error 1 

Oscillators.cpp

#include "Oscillators.h" #include <math.h> #include <vector> #include <iostream>  #define TWOPI (6.2831853072)  using namespace std;  oscillator(int srate = 44100, int tabsize = 8192, double freq = 200) // Default to output 200Hz Sine Wave {     if(srate <= 0) {         cout << "Error: sample rate must be positive" << endl;         return;     }     sizeovrsr_ = (double)tabsize / (double)srate     if(freq < 20 || freq > 20000) {         cout << "Error: frequency is out of audible range" << endl;         return;     }     curfreq_ = freq;     curphase_ = 0.0 // Not out of one, out of tabsize     incr_ = curfreq * sizeovrsr_;     for(int i = 0; i < tabsize; i++) {         gtable.push_back(sin((i*TWOPI)/(double)tabsize));     }     gtable.push_back(gtable[0]); }  void print_table() {     vector<double>::size_type i;     for(i = 0; i < gtable.size(); i++)         cout << gtable[i] << "\n";     cout << endl; } 

Oscillators.h

#ifndef GUARD_OSCILLATORS_H #define GUARD_OSCILLATORS_H #include <vector>  class oscillator { public:     /*     void fill_sine(); // Will change the table to a sine wave     void fill_square(); // Will change the table to a square wave     void fill_sawtooth(); // Will change the table to a sawtooth wave     void fill_triangle(); // Will change the table to a triangle wave     double tick(double freq); // Will output the current sample and update the phase     */     void print_table(); // Will print all table values to standard output     oscillator(int srate = 44100, double freq = 200, int tabsize = 8192); private:     double sizeovrsr_; // Will be set at initialization and will determine phase increase for tick func     double curphase_;     double curfreq_; // if the freq sent to a tick function doesn't match the current tick, it will be reset;     double incr_;     std::vector<double> gtable_; // Will contain a wavetable with a guard point. } #endif 

I've seen other suggestions that mention using g++ -Wall -g but I'm not sure that that is the problem, and that there is something else going on here.

Any help would be much appreciated! Thanks!!

Answer 1

This is a simple problem.

You just forgot the semi colon at the end of your header file.

The compiler errors you get for missing the semi colon at the end of a class definition are very hard to relate to the actual problem - just get in the habit of checking that when you get errors after you create a class.