#include <string.h>

void countWords(){
    
    char str[100] = "hello, my name is gaogaoProgramer, welcome to come here!";
    int index;
    long len = strlen(str);
    int spaceIndex = 0;  //从第一个下标开始算
    int recordMax = 0; //单词空格之间下标最大差即为最长单词
    int beforeIndex = 0,afterIndex = 0; //定义最长单词的前空格，后空格
    for(index = 0; index < len; index++){
        if(str[index] == 32){ //判断空格
            if(index - spaceIndex > recordMax){
                recordMax = index - spaceIndex;
                
                //记录前下标和后下标。
                beforeIndex = spaceIndex;
                afterIndex = index;
            }
            spaceIndex = index;
        }
    }
    
    printf("原始单词为：%s",str);
    printf("\n单词空格之间下标最大差:%d 前下标:%d,后下标:%d",recordMax,beforeIndex,afterIndex);
    
    //输出找到的单词；
    printf("\n\n找到的最长度单词为：");
    int charIndex;
    for(charIndex = beforeIndex; charIndex< afterIndex ; charIndex++){
        printf("%c",str[charIndex]);
    }
}