c++ 去除字符串中的空格和标点符号 （remove_if 函数的用法）

#include <ctype.h>
#include <algorithm>

str_testing.erase( 
		remove_if ( str_testing.begin(), str_testing.end(), static_cast<int(*)(int)>(&ispunct) ), 
		str_testing.end()); 
		
str_testing.erase( 
		remove_if ( str_testing.begin(), str_testing.end(), static_cast<int(*)(int)>(&isspace) ), 
		str_testing.end());