直接看源码，内有详细解释
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/* 测试vector, list, map遍历时删除符合条件的元素 本代码测试环境: ubuntu12 + win7_x64*/#include <iostream>#include <vector>#include <list>#include <map>#include <iterator>using namespace std;void Remove1(vector<int> &vec, int num){ for (vector<int>::iterator it = vec.begin(); it != vec.end();) { if (*it == num) it = vec.erase(it); else it++; }}void Remove2(list<int> &lst, int num){ list<int>::iterator it; for (it=lst.begin(); it!=lst.end();) { if (*it == num) { lst.erase(it++); } else it++; }}void initMap(map<int, int>& m, int arr[], int arrLen){ for(int i = 0; i < arrLen; i++) m[i] = arr[i];}void Remove_map(map<int, int>& m, int num){ map<int, int>::iterator it; for(it = m.begin(); it != m.end();) { if (it->second == num) m.erase(it++); else it++; }}void displayMap(map<int, int>& m){ map<int, int>::iterator it = m.begin(); while(it != m.end()) { cout << "key = " << it->first << ", value = " << it->second << endl; it++; } cout << endl;}int main(void){ int arr[] = {1, 3, 5, 5, 5, 13, 7, 5, 7, 9}; int arrLen = sizeof(arr) / sizeof(arr[0]);#if 1 // test vector vector<int> vec(arr, arr+arrLen); Remove1(vec, 5); copy(vec.begin(), vec.end(), ostream_iterator<int>(cout, " ")); cout << endl << endl;#endif // test list list<int> lst(arr, arr+arrLen); Remove2(lst, 5); copy(lst.begin(), lst.end(), ostream_iterator<int>(cout, " ")); cout << endl << endl; // test map map<int, int> m; initMap(m, arr, arrLen); Remove_map(m, 5); displayMap(m); return 0;}/*Win7_x64运行结果:1 3 13 7 7 91 3 13 7 7 9key = 0, value = 1key = 1, value = 3key = 5, value = 13key = 6, value = 7key = 8, value = 7key = 9, value = 9Ubuntu12运行结果:[zcm@cpp #54]$makeg++ -Wall -Os -DLINUX -o a a.cpp[zcm@cpp #55]$./a1 3 13 7 7 9 1 3 13 7 7 9 key = 0, value = 1key = 1, value = 3key = 5, value = 13key = 6, value = 7key = 8, value = 7key = 9, value = 9*/ |
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