5-4.c

日文版畅销书籍10天学会C语言的源程序。适合入门者学习使用。希望对大家有帮助。

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define FALSE 0
#define TRUE 1

//僼傽僀儖専嶕
main () {
	FILE *fp;			//僼傽僀儖億僀儞僞
	char filename[256];	//僼傽僀儖柤
	char key[128]; 		//専嶕暥帤楍
	char c;
	int keylen; 		//専嶕暥帤楍偺挿偝
	int i = 0; 			//専嶕暥帤楍偺埵抲
	int search = FALSE; //専嶕拞僼儔僌
	int count = 0; 		//専嶕暥帤楍弌尰夞悢
	
	//専嶕懳徾僼傽僀儖柤偲専嶕暥帤楍傪寛掕
	printf("僼傽僀儖柤傪擖椡偟偰壓偝偄 > ");
	scanf("%s", filename);
	printf("専嶕暥帤楍 > ");
	scanf("%s", key);
	keylen = strlen(key);

	//僼傽僀儖僆乕僾儞
	if((fp = fopen(filename, "r")) == NULL) {
		printf("僼傽僀儖僆乕僾儞僄儔乕\n");
		exit(1);
	}

	//僼傽僀儖撉傒崬傒
	while((c = fgetc(fp)) != EOF){	
		if(search) { //専嶕拞
			//専嶕暥帤楍偵堦抳偟側偄暥帤偑尰傟偨
			if(c != key[i]) { search = FALSE; i = 0; }
			else { i++; }
		} else { //専嶕拞偱偼側偄
			if(c == key[i]) { search = TRUE; i++; }
		}
		//専嶕暥帤楍偲慡偰堦抳偟偨応崌
		if(keylen == i) { count++; i = 0; search = FALSE; }
	}

	fclose(fp);
	printf("弌尰夞悢丂%d\n", count);

	return 0;
}