C++矢量指針陣列

有struct_gene和struct_units。我將所有Struck_gene的值讀取爲vector。我如何分配指針struck_units.has_gene[i]指向struct_gene向量中的某個值，所以我沒有寫完整副本的stuckt_gene 然後讀取它。C++矢量指針陣列

我嘗試了一段時間，但沒能得到工作液

http://a.imageshack.us/img195/8607/001tfa.jpg

編輯 - 這裏是由Jakobud檢索代碼：

#include <iostream> 
#include <fstream> 
#include <vector> 
#include <time.h> 
#include <stdio.h> 
#include <stdlib.h> 

using namespace std; 
struct struct_gene { 
    string name; 
    string description; 
}; 

struct struct_unit { 
    string name; 
    string surname; 
    int age; 
    int hunger; 
    int happines; 
    vector<struct_gene> *has_genes[12]; 
    struct_unit *maried_to; 
    struct_unit *father; 
    struct_unit *mother; 
}; 

int main() { 
    const int default_unit_count = 4; 
    fstream gene_list; 
    struct_gene * t_struct_gene; 
    t_struct_gene = new struct_gene; 
    gene_list.open("gene_list", ios::in); 
    vector<struct_gene> vector_gene; 
    //string name, description; 

    gene_list >> t_struct_gene->name; 
    getline(gene_list, t_struct_gene->description); 
    while (gene_list) { 
     vector_gene.push_back(*t_struct_gene); 
     gene_list >> t_struct_gene->name; 
     getline(gene_list, t_struct_gene->description); 
    } 
    delete t_struct_gene; 

// for (int i =0; i<vector_gene.size(); i++) { 
//  cout <<vector_gene[i].name <<" "<<vector_gene[i].description<<endl; 
// } 
    struct_unit *t_struct_unit; 
    t_struct_unit = new struct_unit; 

    srand (time(NULL)); 

    vector<struct_unit> vector_units; 

    for (int i=0; i<default_unit_count; i++) { 

     t_struct_unit->name = "unit_name"; 
     t_struct_unit->surname = "unit_surname"; 
     t_struct_unit->age = rand()%200; 
     t_struct_unit->hunger = rand()%70 +30; 
     t_struct_unit->happines = rand()%70 + 30; 
     for (int i=0; i<12; i++) { 
      t_struct_unit->has_genes[i] = vector_gene[rand()%vector_gene.size()]; 
     } 
     t_struct_unit->maried_to = NULL; 
     t_struct_unit->father = NULL; 
     t_struct_unit->mother = NULL; 
     vector_units.push_back(*t_struct_unit); 
    } 

    for (int i=0; i<vector_units.size(); i++) { 
     cout << vector_units[i].name <<" "<<vector_units[i].surname<<endl; 
     cout <<"Age:"<< vector_units[i].age <<" Hunger:"<<vector_units[i].hunger<<" Happines:"<<vector_units[i].happines<<endl; 
     for (int j=0; j<0; j++) { 
      cout <<vector_units[i].has_genes[j].name; 
     } 
     cout <<"==="<<endl; 
    } 
    delete t_struct_unit; 
}

來源

2010-07-14 kurrata

不要發佈您的代碼爲圖像。現在沒有人可以使用它:( – Tom 2010-07-14 01:31:47

請將您的代碼粘貼到問題中，有一個看起來像「101 010」的按鈕將其格式化爲代碼 – Cogwheel 2010-07-14 01:31:49

試試這個;

1）實例struct_unit

struct_unit aunit;

2）然後內部的循環設定在期望的位置（SOME_INDEX基因被你定義）

//inside loop 
vector_gene.push_back(*t_struct_gene); 
aunit.has_genes[SOME_INDEX] = *t_struct_gene; 
//

來源

2010-07-14 01:38:31 Tom

試過這樣做，並且它不工作 t_struct_unit- > has_genes [i] = * vector_gene [rand（）％vector_gene.size（）] – kurrata 2010-07-14 01:56:02

t_struct_unit->has_genes[i] = &vector_gene

這將將一個指向您的基因列表的指針分配到單位的i個插槽中。

但要小心，因爲vector_gene不是全局變量，所以它（及其所有內容）在函數返回後一段時間內會被填充垃圾。由於它位於main，這對您來說可能不是問題，但您應該瞭解堆棧和堆分配的區別。

此外，你確定你想每個struct_unit持有struct_gene s的載體的整個陣列？難道你不想讓每個人只持有12個基因，而不是12個基因的基因？

來源

2010-07-14 01:40:24 Borealid

現在它是主要的，因爲我正在檢查這個東西是如何工作的對於後來我計劃離開所有載體main（）和對他們做的操作認爲函數 – kurrata 2010-07-14 01:44:29

試過這個「t_struct_unit-> has_genes [i] =＆vector_gene [i]」，它沒有工作。 ; – kurrata 2010-07-14 01:53:27

對不起，你只有一個基因載體，我的錯誤，編輯 – Borealid 2010-07-14 01:55:18

http://codepad.org/TZpNS59a：

#include <iostream> 
#include <fstream> 
#include <vector> 
#include <time.h> 
#include <stdio.h> 
#include <stdlib.h> 

using namespace std; 
struct struct_gene { 
    string name; 
    string description; 
}; 

struct struct_unit { 
    string name; 
    string surname; 
    int age; 
    int hunger; 
    int happines; 
    vector<struct_gene> *has_genes[12]; 
    struct_unit *maried_to; 
    struct_unit *father; 
    struct_unit *mother; 
}; 

int main() { 
    const int default_unit_count = 4; 
    fstream gene_list; 
    struct_gene * t_struct_gene; 
    t_struct_gene = new struct_gene; 
    gene_list.open("gene_list", ios::in); 
    vector<struct_gene> vector_gene; 
    //string name, description; 

    gene_list >> t_struct_gene->name; 
    getline(gene_list, t_struct_gene->description); 
    while (gene_list) { 
     vector_gene.push_back(*t_struct_gene); 
     gene_list >> t_struct_gene->name; 
     getline(gene_list, t_struct_gene->description); 
    } 
    delete t_struct_gene; 

// for (int i =0; i<vector_gene.size(); i++) { 
//  cout <<vector_gene[i].name <<" "<<vector_gene[i].description<<endl; 
// } 
    struct_unit *t_struct_unit; 
    t_struct_unit = new struct_unit; 

    srand (time(NULL)); 

    vector<struct_unit> vector_units; 

    for (int i=0; i<default_unit_count; i++) { 

     t_struct_unit->name = "unit_name"; 
     t_struct_unit->surname = "unit_surname"; 
     t_struct_unit->age = rand()%200; 
     t_struct_unit->hunger = rand()%70 +30; 
     t_struct_unit->happines = rand()%70 + 30; 
     for (int i=0; i<12; i++) { 
      t_struct_unit->has_genes[i] = vector_gene[rand()%vector_gene.size()]; 
     } 
     t_struct_unit->maried_to = NULL; 
     t_struct_unit->father = NULL; 
     t_struct_unit->mother = NULL; 
     vector_units.push_back(*t_struct_unit); 
    } 

    for (int i=0; i<vector_units.size(); i++) { 
     cout << vector_units[i].name <<" "<<vector_units[i].surname<<endl; 
     cout <<"Age:"<< vector_units[i].age <<" Hunger:"<<vector_units[i].hunger<<" Happines:"<<vector_units[i].happines<<endl; 
     for (int j=0; j<0; j++) { 
      cout <<vector_units[i].has_genes[j].name; 
     } 
     cout <<"==="<<endl; 
    } 
    delete t_struct_unit; 
}

來源

2010-07-14 01:41:28 kurrata

第62行是我試圖寫指向stuct_gene向量的地方 – kurrata 2010-07-14 01:48:32

這裏是他的代碼：

#include <iostream> 
#include <fstream> 
#include <vector> 
#include <time.h> 
#include <stdio.h> 
#include <stdlib.h> 

using namespace std; 
struct struct_gene { 
    string name; 
    string description; 
}; 

struct struct_unit { 
    string name; 
    string surname; 
    int age; 
    int hunger; 
    int happines; 
    vector<struct_gene> *has_genes[12]; 
    struct_unit *maried_to; 
    struct_unit *father; 
    struct_unit *mother; 
}; 

int main() { 
    const int default_unit_count = 4; 
    fstream gene_list; 
    struct_gene * t_struct_gene; 
    t_struct_gene = new struct_gene; 
    gene_list.open("gene_list", ios::in); 
    vector<struct_gene> vector_gene; 
    //string name, description; 

    gene_list >> t_struct_gene->name; 
    getline(gene_list, t_struct_gene->description); 
    while (gene_list) { 
     vector_gene.push_back(*t_struct_gene); 
     gene_list >> t_struct_gene->name; 
     getline(gene_list, t_struct_gene->description); 
    } 
    delete t_struct_gene; 

// for (int i =0; i<vector_gene.size(); i++) { 
//  cout <<vector_gene[i].name <<" "<<vector_gene[i].description<<endl; 
// } 
    struct_unit *t_struct_unit; 
    t_struct_unit = new struct_unit; 

    srand (time(NULL)); 

    vector<struct_unit> vector_units; 

    for (int i=0; i<default_unit_count; i++) { 

     t_struct_unit->name = "unit_name"; 
     t_struct_unit->surname = "unit_surname"; 
     t_struct_unit->age = rand()%200; 
     t_struct_unit->hunger = rand()%70 +30; 
     t_struct_unit->happines = rand()%70 + 30; 
     for (int i=0; i<12; i++) { 
      t_struct_unit->has_genes[i] = vector_gene[rand()%vector_gene.size()]; 
     } 
     t_struct_unit->maried_to = NULL; 
     t_struct_unit->father = NULL; 
     t_struct_unit->mother = NULL; 
     vector_units.push_back(*t_struct_unit); 
    } 

    for (int i=0; i<vector_units.size(); i++) { 
     cout << vector_units[i].name <<" "<<vector_units[i].surname<<endl; 
     cout <<"Age:"<< vector_units[i].age <<" Hunger:"<<vector_units[i].hunger<<" Happines:"<<vector_units[i].happines<<endl; 
     for (int j=0; j<0; j++) { 
      cout <<vector_units[i].has_genes[j].name; 
     } 
     cout <<"==="<<endl; 
    } 
    delete t_struct_unit; 
}

來源

2010-07-14 01:53:48

C++矢量指針陣列

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