c++ STL 库编程 Vector

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#include <vector>#include <iostream>using namespace std;int main(){vector<double> a;vector<double>::const_iterator i;for(int i=1;i<10;i++){a.push_back(i);}for(i=a.begin();i!=a.end();i++){cout<<(*i)<<endl;}system("pause");return 0;}

#include <cstdlib>#include <iostream>#include <vector>#include <algorithm>using namespace std;template<class T>struct print{void operator()(T& x)const{if(x%2==0){cout <<x<<"  ";}}};int main(){cout<<"使用STL"<<endl;cout<<endl;vector<int> a;for(int i=0;i<10;i++){a.push_back(i);}vector<int>::iterator aBegin,aEnd;aBegin=a.begin();aEnd=a.end();cout<<"输出所有元素："<<endl;for(;aBegin!=aEnd;aBegin++){cout<<*aBegin<<"   ";}cout<<endl;cout<<"输出偶数元素："<<endl;aBegin=a.begin();for_each(aBegin,aEnd,print<int>());cout <<endl<<endl;system("pause");    return 0;}

把字符串传到一个字符变量中，然后每次显示变量中的一个字符：

#include <vector>#include <iostream>using namespace std;char *sentenceArray = "Hello world";//为一个字符数组，以“\0”结束int main(){vector <char> vec;vector <char>::iterator vi;//为字符数组定义一个游标iteratorchar* cptr=sentenceArray;//把一个指针指向“hello world”字符串while(*cptr!='\0'){   vec.push_back(*cptr);cptr++;}for(vi=vec.begin();vi!=vec.end();vi++){cout <<*vi;}cout<<endl;system("pause");return 0;}

#include <iostream>#include <fstream>#include <iterator>#include <vector>#include <string>using namespace std;int main(void){vector<string> v1;ifstream file("d://1.txt");if(file.fail()){cout <<"failed to open .";return 1;}copy(istream_iterator<string>(file),istream_iterator<string>(),inserter(v1,v1.begin()));copy(v1.begin(),v1.end(),ostream_iterator<string>(cout,"   "));cout <<endl;system("pause");return 0;}

利用vector容器定义二位数组：

#include<stdio.h>#include<vector>#include <iostream>using namespace std;int main(){int i = 0, j = 0;vector< vector<int> > Array;vector< int > line;for( j = 0; j < 10; j++ ){  Array.push_back( line );//要对每一个vector初始化，否则不能存入元素。  for ( i = 0; i < 9; i++ )  {   Array[ j ].push_back( i );  }}for( j = 0; j < 10; j++ ){  for( i = 0; i < Array[ j ].size(); i++ )  {   cout << Array[ j ][ i ] << " ";  }cout<< endl;}system("pause");return 0;}

(未完待续…)

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