删除字符串空格

字符串常量不可更改

#include <iostream>
#include <cstdlib>
#include <cstring>
using namespace std;

void deleteStr(char * str)
{

   int nSpaceNum = 0;
   char *p = str;
   char *q = str;
   char *s = str;
   while(*s != '')
   {
       if(*s == ' ')
       {
           nSpaceNum++;
           q++;
       }
       else
       {
          *p = *q;
          *q = ' ';
          p++;
          q++;
       }
       s++;
   }
   cout<<"nSpaceNum=="<<nSpaceNum<<endl;
   cout<<"str=="<<str<<endl;
}
int main()
{
   char* str = " hell o w orl d";
   char *dest = (char*)malloc(sizeof(char)*strlen(str));
   char *d = dest;
   while(*str != '')
    *d++ = *str++;

   deleteStr(dest);


   return 0;
}