c – 如果语句不起作用,则跳过其他部分

概述//this is my source file, .cpp#include <iostream>#include <string>#include "kingdom.h"namespace westeros{ void display(Kingdom pKingdom[], int kingdomElement, string KingdomName){ cout

//this is my source file,.cpp#include <iostream>#include <string>#include "kingdom.h"namespace westeros{    voID display(Kingdom pKingdom[],int kingdomElement,string Kingdomname){        cout << " ---------------- " << endl;        cout << " Searching for kingdom " << Kingdomname << " in westeros " << endl;        for(int i=0; i<kingdomElement; i++){            if (pKingdom[i].m_name == Kingdomname){                cout << " --------------------- " << endl;                cout << Kingdomname << ",population " << pKingdom[i].m_population << endl;                cout << " --------------------- " << endl;            }            else{                cout << " --------------------- " << endl;                cout << Kingdomname << " is not part of Westeros. " << endl;                cout << " --------------------- " << endl;            }        }    }}//this is my main file#include <iostream>#include "kingdom.h"#include <string>using namespace std;using namespace westeros;int main(voID){    int count = 0;    Kingdom* pKingdoms = nullptr;    pKingdoms = new Kingdom[count];    display(pKingdoms,count,"Mordor");    display(pKingdoms,"The_Vale");    delete[]pKingdoms;    pKingdoms = nullptr;    return 0;}//this is my header file#ifndef KINGDOM_H_#define KINGDOM_H_using namespace std;namespace westeros{    class Kingdom{    public:        char m_name[32];        int m_population;      };    voID display(Kingdom pKingdom[],string Kingdomname);}#endif

现在它打印

魔多不属于维斯特洛
魔多不属于维斯特洛
魔多不属于维斯特洛
魔多不属于维斯特洛
魔多不属于维斯特洛

The_Vale不是维斯特洛的一部分
The_Vale,人口234567
The_Vale不是维斯特洛的一部分
The_Vale不是维斯特洛的一部分
The_Vale不是维斯特洛的一部分

解决方法 也许您只是忘了将The_Vale添加到pKingdoms数组中.

所以,这样的事情会让你明白你做错了什么：

在主文件中你可以改进它,如下所示,所有其他文件都可以;)

//this is my main file  #include <iostream>  #include "kingdom.h"  #include <string.h>  using namespace std;  using namespace westeros;  int main(voID){      int count = 0;      // Kingdom* pKingdoms = nullptr;      // pKingdoms = new Kingdom[count];      Kingdom* pKingdoms = new Kingdom[count];   // Might be a better choice,// as it reduces code.      display(pKingdoms,"Mordor");      // pKingdoms doesn't have Mordor      display(pKingdoms,"The_Vale");    // pKingdoms doesn't have The_vale      // Here I add the 'The_Vale to the array       strcpy(pKingdoms[0].m_name,"The_Vale");      pKingdoms[0].m_population = 1000;      display(pKingdoms,"The_Vale");    // pKingdoms have The_vale      delete[]pKingdoms;      pKingdoms = nullptr;      return 0;  }

在编辑之后,也许source.cpp中的这样的东西会有所帮助.

//this is my source file,string Kingdomname){      int flag = -1;        cout << " ---------------- " << endl;        cout << " Searching for kingdom " << Kingdomname << " in westeros " << endl;        for(int i=0; i<kingdomElement; i++)            if (pKingdom[i].m_name == Kingdomname)                flag = i;        if (flag != -1)        {            cout << " --------------------- " << endl;            cout << Kingdomname << ",population " << pKingdom[flag].m_population << endl;            cout << " --------------------- " << endl;        }        else{              cout << " --------------------- " << endl;              cout << Kingdomname << " is not part of Westeros. " << endl;              cout << " --------------------- " << endl;        }    }}

总结

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