2-7.c

c实现的常用几个算法

#include<stdio.h>
#define IN 1
#define OUT 0
void main(void)
{ 
	int c,nl,nw,nc,state;
	state=OUT;	
	nl=nw=nc=0;
	printf("input a text end of crtl+z\n");
	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("lines=%dwords=%d characters=%d\n",nl,nw,nc);
}