/***********write by myself***********/
/***********begin test file***********/
#include <iostream>
#include <string>
int main()
{
std::string str1 = " hello world! ";
std::string trimstring = " ";
std::cout << "str = \"" << str1 << "\"" << std::endl;
std::cout << "str.find_first_of(' ') : " << str1.find_first_of(trimstring) << std::endl;
std::cout << "str.find_first_not_of(' ') : " << str1.find_first_not_of(trimstring) << std::endl;
std::cout << "str.find_last_of(' ') : " << str1.find_last_of(trimstring) << std::endl;
std::cout << "str.find_last_not_of(' ') : " << str1.find_last_not_of(trimstring) << std::endl;
str1.erase(str1.find_last_not_of(trimstring)+1);
std::cout << "after right trim : \"" << str1 << "\"" << std::endl;
str1.erase(0,str1.find_first_not_of(trimstring));
std::cout << "after left trim : \"" << str1 << "\"" << std::endl;
return 0;
}
/***********end test file***********/