统计字符串中的单词数量

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


int wordnums( char *s) {

    if(s == NULL)
        return 0;
    int num = 0;

    char *pchar = s;

    while(*pchar != '\0') {

        while(*pchar == ' ') pchar++;//去除空格

        while(*pchar != ' ' && *pchar != '\0') pchar++;
        num++;

        while(*pchar == ' ') pchar++;//去除空格
    }
    return num;
}

int main() {
    char str[] = "   Hello Nice to meet you!";
    cout << wordnums(str) << endl;

    return 0;
}