我正在尝试使用std :: string的比较功能。这是我的代码:
int main() {
string str1 = {"apple"};
vector<string> vec1 = {"apple"};
string suffix = {"le"};
if (str1.compare(str1.size() - suffix.length(), suffix.length(), suffix) == 0)
cout << "Yes!!" << endl; // This prints
if (vec1[0].compare(vec1[0][vec1[0].size() - suffix.length()], suffix.length(), suffix) == 0)
cout << "Yes-1!!" << endl; // This doesn't
}
输出为:
Yes!!
terminate called after throwing an instance of 'std::out_of_range'
what(): basic_string::compare: __pos (which is 108) > this->size() (which
is 5)
Aborted (core dumped)
需要一些帮助来弄清楚我在做什么错。谢谢。
答案 0 :(得分:4)
我已将您第二个电话compare()
更改为此:
if (vec1[0].compare(vec1[0].size() - suffix.length(), suffix.length(), suffix) == 0)
因为不清楚您在原始通话中要完成什么。
这是完整的代码,不会抛出错误:
#include <string>
#include <vector>
#include <iostream>
using namespace std;
int main() {
string str1 = {"apple"};
vector<string> vec1 = {"apple"};
string suffix = {"le"};
if (str1.compare(str1.size() - suffix.length(), suffix.length(), suffix) == 0)
cout << "Yes!!" << endl; // This prints
if (vec1[0].compare(vec1[0].size() - suffix.length(), suffix.length(), suffix) == 0)
cout << "Yes-1!!" << endl; // This doesn't
}
另外,请注意在代码中带有错别字的发布,因为对此问题的评论已经指出。