面试题 字符串去除空格

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

int  main(){
    char testArray[] = "abcd ef  gh i 123 ";
    cout <<"输入的字符串："<<testArray <<endl;

    char *p = testArray;
    char *q = p;
    while(*p != ''){
                if(*p != ' '){
                    *q = *p;
                    q ++;
                    p ++;
                }
                else{
                    p ++;
                }
        }
    *q = *p;
    cout<<"去掉空格后的字符串："<< testArray<<endl;
    return 0;
}