去掉字符串前后的空格

#include 
#include 
#include 
char *strtrimr(char *pstr)
{
	int i;
	i = strlen(pstr) - 1;
	while (isspace(pstr[i]) && (i >= 0))
		pstr[i--] = '\0';
	return pstr;
}

char *strtriml(char *pstr)
{
	int i = 0,j;
	j = strlen(pstr) - 1;
	while (isspace(pstr[i]) && (i <= j))
		i++;
	if (0