输入一行字符，计算字符中有多少单词，单词和单词之间以空格分开

#include <stdio.h>#include <string.h>int main(){char a[100] = {0};char *p = a;int i = 0;int len = 0;int num = 0;int world = 0;printf("请输入要计算的句子:\n");gets(a);len = strlen(p);//计算输入字符的长度；for(i = 0; i < len; i++){if(*p == ' ')//判断一个单词是否结束；{world = 0;//world置0防止单词与单词之间有多个空格；}else{if(world == 0){world = 1;num++;//计算有多少个单词；}}p++;}printf("%d\n",num);return 0;}