C++去掉字符串中首尾空格和所有空格
阿新 • • 發佈:2018-07-02
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c++去掉首尾空格是參考一篇文章的,但是忘記文章出處了,就略過吧。
去掉首尾空格的代碼如下:
1 void trim(string &s)
2 {
3
4 if( !s.empty() )
5 {
6 s.erase(0,s.find_first_not_of(" "));
7 s.erase(s.find_last_not_of(" ") + 1);
8 }
9
10 }
去掉字符串中所有空格的代碼如下:
1 void trim(string &s)
2 {
3 /*
4 if( !s.empty() )
5 {
6 s.erase(0,s.find_first_not_of(" "));
7 s.erase(s.find_last_not_of(" ") + 1);
8 }
9 */
10 int index = 0;
11 if( !s.empty())
12 {
13 while( (index = s.find(‘ ‘,index)) != string::npos)
14 {
15 s.erase(index,1);
16 }
17 }
18
19 }
測試代碼如下:
1 int main()
2 {
3
4 cout << "-------------------------------------" << endl;
5
6 string pri = " 7ter 09, jdhfd iere*- ddw jjdjjdj ";
7 cout << "private string is : \"" << pri << "\"" << endl;
8 trim(pri);
9 cout << "after string is : \"" << pri << "\"" << endl;
10
11 cout << "-------------------------------------" << endl;
12
13 return 0;
14 }
結果如下圖:
C++去掉字符串中首尾空格和所有空格