C, God's Programming Language

iteye_18800

于 2012-04-01 20:18:00 发布

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本文介绍了一个简单的C语言程序，该程序能够统计用户输入文本中的行数、单词数和字符数。通过对输入字符的状态判断（单词内或单词外），实现单词计数。

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count lines, words, and characters in input

#include <stdio.h>

#define IN  1	/* inside a word */
#define OUT 0	/* outside a word */

/* count lines, words, and characters in input */		
int main(void)
{
		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\n", nl, nw, nc);

		return 0;
}