c++去掉首尾空格是参考一篇文章的,但是忘记文章出处了,就略过吧。
去掉首尾空格的代码如下:
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码如下:
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 }
测试代码如下:
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 }
结果如下图: