c++ string 对象操作

字符串转换大小写如下：

 1 #include "stdafx.h"
 2 #include <iostream>
 3 #include <string>
 4 
 5 using namespace std;
 6 
 7 int main()
 8 {
 9     string str = "helloworld";
10     for (auto begin = str.begin(); begin != str.end(); ++begin)
11     {
12         *begin = toupper(*begin);
13     }
14     
15     cout << str << endl;
16 
17     system("PAUSE");
18     return 0;
19 }
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删除字符串中所有的大写字母:

 1 #include "stdafx.h"
 2 #include <iostream>
 3 #include <string>
 4 
 5 using namespace std;
 6 
 7 int main()
 8 {
 9     string str("helloWorld");
10     for (auto begin = str.begin(); begin != str.end();)
11     {
12         if (isupper(*begin))
13         {
14             begin = str.erase(begin);
15             continue;
16         }
17         ++begin;
18     }
19 
20     cout << str << endl;
21 
22 
23     system("PAUSE");
24     return 0;
25 }
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用vector对象初始化string ：

 1 #include "stdafx.h"
 2 #include <iostream>
 3 #include <string>
 4 #include <vector>
 5 
 6 using namespace std;
 7 
 8 
 9 int main()
10 {
11     vector<char> vect;
12     char arry[] = {'h','e','l','l','o'};
13     vect.insert(vect.begin(),arry,arry+5);
14     char *pc = new char[vect.size()+1];
15     int i = 0;
16     for (vector<char>::iterator begin = vect.begin(); begin != vect.end(); ++begin)
17     {
18         pc[i] = *begin;
19         ++i;
20     }
21     pc[vect.size()] = '\0';
22     string str(pc);
23     delete [] pc;
24     cout << str << endl;
25     system("PAUSE");
26     return 0;
27 }
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posted on 2017-03-08 16:16  ^~~^  阅读(366)  评论(0)  编辑  收藏  举报

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