運行exe時找不到入口點 - C++

Question

我想運行一個包含C++代碼的exe文件，但它一直給我一個「找不到入口點」的錯誤。

首先，這是一項基於早期作業解決方案的作業作業。我編譯了它，並試圖運行生成的exe文件，但我遇到了同樣的問題。

下面是我下載的代碼。

#include <iostream> //for cout, cin 
#include <iomanip> // for setw, fixed, setprecision() manipulators 
#include <fstream> //for file input/output 
#include <string.h> //for string types usage 
#include <cstdlib> 
using namespace std; 

/* 
Structure to store the date 
*/ 
struct Date 
{ 
int month; 
int day; 
int year; 
}; 

/* 
Structure to store Vehicle Options 
*/ 
struct Option 
{ 
string seatMaterial; 
int wheelSize; 
string stereo; 
string winterPackage; 
}; 

/* 
Structure to store Vehicles data 
*/ 
struct Vehicle 
{ 
int ID; 
string name; 
int cylinder; 
string trans; 

Date manufDate; 
Date shipDate; 

Option vehicleOptions; 

char receiverFlag; // I or D 

//for individuals 
string ind_first, ind_last, ind_address; 

//for dealers 
int deal_zip; 


}; 

Vehicle* readVehicleFromFile(int &totalVehicles); 
void menu(Vehicle *vehicle, int totalVehicle); 
void printHorizontalLine(int width, char border_char); 
void printVehicle(Vehicle *vehicle, int totalVehicle, char flags); 

/* 
* Entry point 
*/ 
int main() 
{ 
Vehicle *allVehicle; 
int totalVehicle = 0; 
allVehicle = readVehicleFromFile(totalVehicle); 

if(allVehicle == NULL) 
{ 
    cout << "allVehicle is NULL" << endl; 
    return 0; 
} 

printVehicle(allVehicle, totalVehicle, ' '); 
menu(allVehicle, totalVehicle); 

return 0; 
} 



/* 
* Responsible for reading Vehicle records from vehicles.txt into Vehicle  array of structs 
* 
* 
* @param totalVehicle: reference variable which post execution, contains size of Vehicle 
* @param return: pointer pointing to the array of structs containing Vehicle data 
*/ 
Vehicle* readVehicleFromFile(int &totalVehicle) 
{ 
char delimiter; 
Vehicle *allVehiclePointer; 
//input stream for Vehicle data 
ifstream allVehicleInFile; 

//open Vehicles file 
allVehicleInFile.open("vehicles.txt"); 

//error handling in case file does not exist - start 
if(!allVehicleInFile) 
{ 
    cout << "Error opening vehicles.txt" << endl; 
    return NULL; 
} 
//error handling in case file does not exist - end 
cout << "Success opening vehicles.txt" << endl; 
allVehicleInFile >> totalVehicle; 
allVehiclePointer = new Vehicle[totalVehicle]; 

cout << "totalVehicles: " << totalVehicle << endl; 

for(int i = 0; i < totalVehicle; i++) 
{ 
    allVehicleInFile >> allVehiclePointer[i].ID; 
    allVehicleInFile >> allVehiclePointer[i].name; 
    allVehicleInFile >> allVehiclePointer[i].cylinder; 
    allVehicleInFile >> allVehiclePointer[i].trans; 
    //get dates 
    allVehicleInFile >> allVehiclePointer[i].manufDate.month; 
    allVehicleInFile >> delimiter; //delimiter = ':' 
    allVehicleInFile >> allVehiclePointer[i].manufDate.day; 
    allVehicleInFile >> delimiter; 
    allVehicleInFile >> allVehiclePointer[i].manufDate.year; 

    allVehicleInFile >> allVehiclePointer[i].shipDate.month; 
    allVehicleInFile >> delimiter; 
    allVehicleInFile >> allVehiclePointer[i].shipDate.day; 
    allVehicleInFile >> delimiter; 
    allVehicleInFile >> allVehiclePointer[i].shipDate.year; 
} 
allVehicleInFile.close(); 

int dummyID = 0; 
allVehicleInFile.open("options.txt"); 
//read vehicle options 
for (int j = 0; j < totalVehicle; j++){ 
    allVehicleInFile >> dummyID; 
    // if (dummyID == 20) 
    // dummyID = 0; 
    allVehicleInFile >>  allVehiclePointer[dummyID].vehicleOptions.seatMaterial; 
    allVehicleInFile >> allVehiclePointer[dummyID].vehicleOptions.wheelSize; 
    allVehicleInFile >> allVehiclePointer[dummyID].vehicleOptions.stereo; 
    allVehicleInFile >> allVehiclePointer[dummyID].vehicleOptions.winterPackage; 
} 

allVehicleInFile.close(); 
allVehicleInFile.open("owner.txt"); 
//read owner information 
for (int k = 0; k < totalVehicle; k++){ 
    allVehicleInFile >> dummyID; 
    //if (dummyID == 20) 
     //dummyID = 0; 
    allVehicleInFile >> allVehiclePointer[dummyID].receiverFlag; 

    if (allVehiclePointer[dummyID].receiverFlag == 'D') //this is a dealer vehicle 
     allVehicleInFile >> allVehiclePointer[dummyID].deal_zip; 
    else{ // this is an individual's vehicle 
     allVehicleInFile >> allVehiclePointer[dummyID].ind_first; 
     allVehicleInFile >> allVehiclePointer[dummyID].ind_last; 
     getline(allVehicleInFile, allVehiclePointer[dummyID].ind_address); 
    } 
} 
allVehicleInFile.close(); 

return allVehiclePointer; 
} 


/* 
* Responsible for printing menu and handling user selection 
* 
* 
* @param Vehicle: pointer pointing to the array of structs containing Hospital Personnel data 
* @param totalVehicle: size of Vehicle 
*/ 

void menu(Vehicle *vehicle, int totalVehicle) 
{ 
int input; 
while(true) 
{ 
    cin >> input; 
    switch(input) 
    { 
     case 0: 
      // 0 - print all vehicles 
      printVehicle(vehicle, totalVehicle, ' '); 
      break; 
     case 1: 
      // 1 - print only vehicles manufactured for dealers 
      printVehicle(vehicle, totalVehicle, 'D'); 
      break; 
     case 2: 
      // 2 - print only vehicles manufactured for individuals 
      printVehicle(vehicle, totalVehicle, 'I'); 
      break; 
     case 3: 
      // 3 - print only vehicles with 4 cylinder engines 
      printVehicle(vehicle, totalVehicle, '4'); 
      break; 
     case 4: 
      // 4 - print only vehicles with premium stereos 
      printVehicle(vehicle, totalVehicle, 'P'); 
      break; 
     case 5: 
      // 5 - print only vehicles with leather seats 
      printVehicle(vehicle, totalVehicle, 'L'); 
      break; 
     case 6: 
      // 6 - exit 
      exit(0); 
    } 

} 
} 

/* 
* Responsible for printing the Vehicle array of structs 
* 
* 
* @param vehicle: pointer pointing to the array of structs containing Vehicle data 
* @param totalVehicle: size of vehicle 
*/ 
void printVehicle(Vehicle *vehicle, int totalVehicle, char flags){ 

if(vehicle == NULL || totalVehicle < 1) 
{ 
    return; 
} 

cout << endl; 
printHorizontalLine(85, '*'); 
printHorizontalLine(85, '*'); 
for(int i = 0; i < totalVehicle; i++) 
{ 

    if(flags != ' ') 
    { 
     if((flags == 'I' && vehicle[i].receiverFlag != 'I') || (flags == 'D' && vehicle[i].receiverFlag != 'D') || (flags == 'L' && vehicle[i].vehicleOptions.seatMaterial != "Leather") || (flags == '4' && vehicle[i].cylinder != 4) || (flags == 'P' && vehicle[i].vehicleOptions.stereo != "Premium")) 
     { 
      // skip roles which do not match roleFlag 
      continue; 
     } 
    } 
    // filter - end 

    cout.clear(); 
    cout.fill(' '); 

    cout 
    << left 
    << setw(3) 
    << i 
    << left << setw(10) 
    << vehicle[i].name 
    << left << setw(3) 
    << vehicle[i].cylinder 

    << left << setw(10) 
    << vehicle[i].trans 
    << left 
    << vehicle[i].manufDate.month << ':' << vehicle[i].manufDate.day << ':' << vehicle[i].manufDate.year 
    << left << "\t" 
    << vehicle[i].shipDate.month << ':' << vehicle[i].shipDate.day << ':' << vehicle[i].shipDate.year 
    << "\t" ; 

    //print options 
    cout << left << setw(10) 
    << vehicle[i].vehicleOptions.seatMaterial 
    << left << setw(5) 
    << vehicle[i].vehicleOptions.wheelSize 
    << left << setw(10) 
    << vehicle[i].vehicleOptions.stereo 
    << left << setw(5) << vehicle[i].vehicleOptions.winterPackage; 

    cout << left << setw(3) << vehicle[i].receiverFlag; 

    if (vehicle[i].receiverFlag == 'D') 
     cout << left << setw(7) << vehicle[i].deal_zip; 
    else 
     cout << left << setw(3) 
     << vehicle[i].ind_first << " " << vehicle[i].ind_last 
     << " " 
     << vehicle[i].ind_address; 

    cout << endl; 
} 
printHorizontalLine(85, '*'); 
printHorizontalLine(85, '*'); 
cout << endl; 
cout << "0 - Print all vehicles" <<endl; 
cout << "1 - Print only vehicles manufactured for dealers" << endl; 
cout << "2 - Print only vehicles manufactured for individuals" << endl; 
cout << "3 - Print only vehicles with 4 cylinder engines" << endl; 
cout << "4 - Print only vehicles with premium stereos" << endl; 
cout << "5 - Print only vehicles with leather seats" << endl; 
cout << "6 - Exit: "; 
} 


/* 
* Responsible for printing a horizontal line which consists of border_char  characters 
* 
* 
* @param width: count of border_char 
* @param border_char: width made out of characters 
*/ 
void printHorizontalLine(int width, char border_char) 
{ 
cout.fill(border_char); 
cout << setw(width) << border_char << "\n"; 
cout.fill(' '); 
} 

在試圖找到問題的根源時，我隔離了代碼並嘗試使用它。我發現，當我取消註釋這兩位代碼時，它破裂了。

(flags == 'L' && vehicle[i].vehicleOptions.seatMaterial != "Leather") 
(flags == 'P' && vehicle[i].vehicleOptions.stereo != "Premium") 

以下是錯誤的全文：「過程入口點_ZNKSt7_cxx1112basic_stringlcSt11char_traitslcESalcEE7compareEPKc不能設在動態鏈接庫C：\用戶\扎克\文檔\學院 - 春天2017年\ CS 250 \作業1 \ Solution \ Vehicles \ bin \ Debug \ Vehicles.exe「

Answer 1

找到包含libstdc++-6.dll的目錄並將其添加到您的PATH變量中。

1. 打開命令提示符
2. 運行set PATH=%PATH%;YOUR_PATH_HERE

您也可以靜態鏈接到的libstdC++。對於Code::Blocks您可以檢查this question

，或者使用命令行構建它：

g++ -c -o main.o main.cpp 
g++ -o main.exe main.o -static-libstdc++