书本例子strindex函数

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#include <stdio.h>/*对输入的一行字符串做模版匹配,有匹配则输出*/int getline(char line[], int max);int strindex(char source[], char searchfor[]);//#include "subfunctions.h"#define MAXLINE 1000char pattern[] = "ould";int main(){char line[MAXLINE];int found = 0;//不断的读取一行,有模版匹配则输出while(getline(line, MAXLINE) > 0)if(strindex(line, pattern) >= 0){printf("%s", line);found++;}return found;}

#include <stdio.h>int getline(char s[], int lim){int c, i;i = 0;//对最长行和文件结束有单独处理//行的最大长度由存储数组的大小决定//输入从getchar得到while(--lim > 0 && (c = getchar()) != EOF && c != '\n')s[i++] = c;if(c=='\n')s[i++] = c;s[i] = '\0';return i;}

int strindex(char s[], char t[]){int i, j, k;for(i = 0; s[i] != '\0'; i++){//对原来的字符串重新取下标,扫描完做匹配的模版,则匹配成功for(j = i, k = 0; s[j] == t[k]; j++, k++);if(k > 0 && t[k] == '\0')return i;}return -1;}

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