/*这段查找每行中含有"ould"  并输出该行的程序怎么执行结果没有输出任何东西 */
# include <stdio.h>
# define MAXLINE 1000

int getline(char line[], int max);
int strindex(char source[], char searchfor[]);

char pattern[] = "ould";

int main()
{
    char line[MAXLINE];
    int found = 0;

    while (getchar(line, MAXLINE) > 0)
        if (strindex(line, pattern) >= 0)
        {
            printf("%s", line);
            found++;
        }
    return found;
}

int getline(char line[], int lim)
{
    int c, i;
    for (i = 0; --lim>0 && (c=getchar())!=EOF && c!='\n'; ++i)
        line[i] = c;
    if (c == '\n')
        line[i++] = c;
    line[i] = '\0';
    return i;
}

int strindex(char s[], char t[])
{
    int i, j, k;

    for (i = 0; s[i] != '\0'; ++i)
    {
        for (j = i, k = 0; t[k] != '\0' && s[j] == t[k]; ++j, ++k);
    if (k > 0 && t[k] == '\0')
        return i;
    }
    return -1;
}

[ 本帖最后由 cajcak 于 2014-11-4 22:42 编辑 ]

额 输入错了 太马虎了 while (getchar(line, MAXLINE) > 0)
while (getline(line, MAXLINE) > 0)