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Ich bekomme diesen Fehler, wenn ich das Programm erstelle: Apple Mach-O Linker (ld) ErrorLinker Command failed with exit code 1. Normalerweise, wenn ich versuche, diesen Fehler zu beheben, ist es, weil die Datei mit der Hauptfunktion #include -eine Datei mehr als einmal. Ich glaube jedoch nicht, dass dies diesmal der Fall ist. Ich werde auch von X-Code benachrichtigt, dass die duplicate symbol _passed in:ranker.o und olympic.o.Warum hat mein Code einen "Apple Mach-O Linker Fehler?"
//competitor.h
#ifndef __Olympic_Lab__competitor__
#define __Olympic_Lab__competitor__
#include <iostream>
using namespace std;
class Competitor {
char* name = nullptr;
int laneAssignment;
float time;
public:
Competitor(char n[], int lane);
~Competitor();
void setTime(float f);
char* getName(){ return name; }
int getLane(){ return laneAssignment; }
float getTime(){ return time; }
void print(){ cout << name << endl; }
};
#endif
//competitor.cpp
#include "competitor.h"
Competitor::Competitor(char n[], int lane){
name = n;
laneAssignment = lane;
}
Competitor::~Competitor(){
//does nothing for now
}
void Competitor::setTime(float t){
time = t;
}
//ranker.h
#ifndef __Olym__ranker__
#define __Olym__ranker__
#include <vector>
#include "competitor.h"
using namespace std;
int passed = 0;
class Ranker {
bool boolean = true;
public:
vector<Competitor*> rv;
Ranker(int lanes);
~Ranker();
int addList(Competitor* c);
Competitor* getLane(int lane);
Competitor* getFinish(int finish);
int getFilled();
};
#endif
//ranker.cpp
#include "ranker.h"
Ranker::Ranker(int lan){
rv.resize(lan - 1);
for(int i = 0; i <= rv.size(); i++){
rv[i] = nullptr;
}
}
Ranker::~Ranker(){
for(int i = 0; i <= rv.size(); i++){
delete rv[i];
}
}
int Ranker::addList(Competitor *c){
if(c != NULL && passed <= 4){
rv[passed++] = c;
return passed - 1;
}
return 0;
}
Competitor* Ranker::getLane(int lane){
for(int i = 0; i <= rv.size(); i++){
if(rv[i]->getLane() == lane && rv[i] != NULL){
return rv[i];
}
}
return rv[0];
}
Competitor* Ranker::getFinish(int finish){
if(boolean){
Competitor *temp = nullptr;
int highestIndex;
for(int i = rv.size(); i >= 0; i--){
highestIndex = i;
for(int j = i; j >= 0; j--){
if(rv[j] != nullptr && rv[highestIndex] != nullptr){
if(rv[j]->getTime() > rv[highestIndex]->getTime())
highestIndex = j;
}
}
temp = rv[i];
rv[i] = rv[highestIndex];
rv[highestIndex] = temp;
}
delete temp;
temp = *new Competitor*;
boolean = false;
}
return rv[finish - 1];
}
int Ranker::getFilled(){
int filled = 0;
for(int i = 0; i <= rv.size(); i++){
if(rv[i] != NULL){
filled++;
}
}
return filled;
}
//olympic.h
#ifndef _Olympic_Lab__olympic__
#define _Olympic_Lab__olympic__
#include "ranker.h"
#endif
//olympic.cpp
#include "olympic.h"
int main(){
const int lanes = 4;
Ranker rank(lanes);
Competitor* starters[4];
starters[0] = new Competitor("EmmyLou Harris", 1);
starters[1] = new Competitor("Nanci Griffith", 2);
starters[2] = new Competitor("Bonnie Raitt", 3);
starters[3] = new Competitor("Joni Mitchell", 4);
starters[0]->setTime((float)12.0);
starters[1]->setTime((float)12.8);
starters[2]->setTime((float)11.0);
starters[3]->setTime((float)10.3);
for(int i = 0; i < lanes; i++){
rank.addList(starters[i]);
}
cout << "Competitors by lane are:" << endl;
for(int i = 1; i <= lanes; i++)
rank.getLane(i)->print();
cout << "Rankings by finish are:" << endl;
for(int i = 1; i <= lanes; i++)
rank.getFinish(i)->print();
for(int i = 0; i < lanes; i++){
delete starters[i];
}
}
Es wäre dankbar, wenn mir jemand helfen könnte bei der Suche nach genau was diesen Fehler verursacht. Vielen Dank!