C1 - 1.5.4 Word Counting 单词计数

Word Counting 单词计数

Version 1:

#include<stdio.h>

int main(){
    int c, n;
    n = 0;
    while((c = getchar()) != EOF){
        if(c != ' ' && c != '\t' && c != '\n')
            n ++;
        while(c != ' ' && c != '\t' && c != '\n')
            c = getchar();//因为get到空格不算空格都可以,所以不ungetc了

    }
    printf("%d\n", n);
}


 

Version 2:

#include<stdio.h>

int main(){
    int c, state, nw;
    state = 0;//outside

    nw = 0;
    while((c = getchar()) != EOF){
        if(c == ' ' || c == '\t' || c == '\n')
            state = 0;
        else if(state == 0){
            nw++;
            state = 1;
        }
    }
    printf("%d\n", nw);
}