elegant-code

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统计行数，单词书与字符串数， 这里对单词的定义 比较宽松， 他是任何不包含空格、制表符或者换行符序列。下面这段程序使 UNIX系统中wc程序的骨干部分。

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#include<stdio.h>
#define IN 1 /*inside a word*/
#define OUT 0 /*outside a word*/
/* count lines, words,  and characters  in input*/
int main(){
    int c, nl, nw, nc, state;
    state = OUT;
    nl = nw = nc = 0;
    while((c==getchar() != EOF)){
        ++nc;
        if(c=='\n')
            ++nl;
        if(c==' '|| c=='\n' ||c ='\t')
            state==OUT;
        else if(state==OUT){
            state = IN;
            ++nw;
        }
        printf("%d %d %d", nl, nw, nc);
    }
}