Kindergarten Counting Game - UVa494

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题目描述

 Kindergarten Counting Game 

Everybody sit down in a circle. Ok. Listen to me carefully.

``Woooooo, you scwewy wabbit!''

Now, could someone tell me how many words I just said?

Input and Output

Input to your program will consist of a series of lines, each line containing multiple words (at least one). A ``word'' is defined as a consecutive sequence of letters (upper and/or lower case).

Your program should output a word count for each line of input. Each word count should be printed on a separate line.

Sample Input

Meep Meep!I tot I taw a putty tat.I did! I did! I did taw a putty tat.Shsssssssssh ... I am hunting wabbits. Heh Heh Heh Heh ...

Sample Output

27109

解题思路

这个题目要统计每行中的单词数目。
注意对输入的处理。
使用了一个状态标志state：
state为1表示上一字符在单词内；
state为0表示上一字符不在单词内。

代码实现

#include <stdio.h>int isl(char c) {if((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {return 1;} else {return 0;}}int main(void) {char s[100000];int rear = 0;int c;while((c = getchar()) != EOF) {s[rear++] = c;}s[rear] = '\0';int i = 0;int num = 0;int state = 0;while(s[i] != '\0') {if(s[i] == '\n') {printf("%d\n", num);num = 0;state = 0;} else {if(isl(s[i])) {if(state == 0) {num++;}state = 1;} else {state = 0;}}i++;}return 0;}

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