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

int SafeStrcpy2KeyWord(char* pDestBuffer,	//源字符串
		       		char* pSourceString,	//目的字符串
		       		int nDestBufferSize,	//缓冲区长度
		       		char* szKeyWord		//指定键字符串
		       		) {
	char buf[nDestBufferSize];
	int index = -1, i, j;
	for(i=0; pDestBuffer[i]!=0&&i<nDestBufferSize; i++) {
		if(pDestBuffer[i]==szKeyWord[0]) {
			
			for(j=1; szKeyWord[j]!=0&&pDestBuffer[i+j]!=0&&i+j<nDestBufferSize; j++) {
				if(pDestBuffer[i+j]!=szKeyWord[j]) break;
			}
			if(szKeyWord[j]==0) {
				index = i;
				break;
			}
		}
	}
	if(index==0) {
		pSourceString[0] = 0;
		return index;
	}
	
	if(index==-1) {
		for(i=0; i<pDestBuffer[i]!=0&&i<nDestBufferSize; i++) {
			pSourceString[i] = pDestBuffer[i];
		}
		if(pDestBuffer[i]!=0) return 0;
		pSourceString[i] = 0;
		return i;
	}
	
	for(i=0; i<index; i++) {
		pSourceString[i] = pDestBuffer[i];
	}
	pSourceString[index] = 0;
	return index;
}

void getline(char str[], int limit) {
	char c;
	int i;
	i=0;
	scanf("%c", &c);
	while(c!='\n'&&i<limit) {
		str[i++] = c;
		scanf("%c", &c);
	}
	str[i] = 0;
}

int main() {
	char sourceString[300], newString[300];
	char key[30];
	int len;
	
	while(scanf("%s", &sourceString)!=EOF) {
		getline(key, 30);
		while(1) {
			getline(key, 30);
			if(key[0]=='E'&&key[1]=='N'&&key[2]=='D'&&key[3]==0) {
				break;
			}
			
			if(key[0]=='N'&&key[1]=='U'&&key[2]=='L'&&key[3]=='L'&&key[4]==0) {
				printf("0 NULL\n");
				continue;
			}
			len = SafeStrcpy2KeyWord(sourceString, newString, 300, key);
			if(len==0) printf("0 NULL\n");
			else printf("%d %s\n", len, newString);
		}
	}
	return 0;	
}

• Re:到底是怎么回事？？n个wa。。 (53) Zerlier 2010-01-16 12:04:09