Length of Last Word

Given a string s consists of upper/lower-case alphabets and empty space characters ‘ ‘, return the length of last word in the string.

If the last word does not exist, return 0.

Note: A word is defined as a character sequence consists of non-space characters only.

For example, 
Given s = "Hello World",
return 5.

include<stdio.h>
#include<string.h>

int lengthOfLastWord(char *s){
    int len=strlen(s);
    int i,cnt=0,flag=0;
    for(i=len-1;i>=0;i--){
        if(s[i]==' ') {
            if(flag==0)
                continue;
            else break;
        }
        else {cnt++;flag=1;}
    }
    return cnt;
}

void main(){
    char s[]="  ";
    int a=lengthOfLastWord(s);
    printf("%d\n",a);
}

Length of Last Word

原文：http://blog.csdn.net/uj_mosquito/article/details/41447751