统计行数、单词数，字符数的程序：
#include<stdio.h> #define IN 1 /*在单词内*/
#define OUT 0 /*在单词外*/ int main()
{
int c, nl, nw, nc, state; state = OUT;
nl = nw = nc = ; //nl：行数 nw：单词数 nc：字符数
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 ;
}
【练习1-12】
编写一个程序，以每行一个单词的形式打印其输入
#include<stdio.h> #define IN 1 /*在单词内*/
#define OUT 0 /*在单词外*/ int main()
{
int c, state;
state = OUT; while((c =getchar()) != EOF) {
if(c == ' ' || c == '\n' || c == '\t') {
if(state == IN) {
putchar('\n');
state = OUT;
}
} else if(state == OUT) {
state = IN;
putchar(c);
} else {
putchar(c);
}
}
return ;
}