c++ vector

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#include <iostream>#include <vector>using std::cout;using std::endl;using std::vector;int main(){    vector<int> ivec;       int val;    for (vector<int>::size_type ix = 0;                                ix != 10; ++ix)          ivec.push_back(ix);    cout << "ivec.size: " << ivec.size() << endl;         if (ivec.empty() == false) {        for (vector<int>::size_type ix = 0;                           ix != ivec.size(); ++ix)            cout << ivec[ix] << endl;     }     return 0;}

输出：

pateo@pateo-B86N53X:~/work/study$ g++ -o main main.ccpateo@pateo-B86N53X:~/work/study$ ./mainivec.size: 100123456789

#include <iostream>#include <vector>using std::cout;using std::endl;using std::vector;int main(){    vector<int> ivec;       int val;    for (vector<int>::size_type ix = 0;                                ix != 10; ++ix)          ivec.push_back(ix);    cout << "ivec.size: " << ivec.size() << endl;      for (vector<int>::size_type ix = 0; ix != ivec.size(); ++ix)        ivec[ix] = 0;    if (ivec.empty() == false) {        for (vector<int>::size_type ix = 0;                           ix != ivec.size(); ++ix)            cout << ivec[ix] << endl;     }     return 0;}

输出：

pateo@pateo-B86N53X:~/work/study$ g++ -o main main.ccpateo@pateo-B86N53X:~/work/study$ ./mainivec.size: 100000000000