OJ Board

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......
char input[810]; 
......

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

int reverse(char* str)
{
	char c;
	int i,j;
	i=0;
	j=strlen(str)-1;
	while(i<j)
	{
		c=str[i];
		str[i]=str[j];
		str[j]=c;
		i++;
		j--;
	}
	return 0;
}

char* encode(char* str,char* res)
{
	int i;
	for(i=0;i<strlen(str) && str[i]!='\n' && str[i]!='\r';i++)
	{
		sprintf(res,"%s%d",res,str[i]);
	}
	reverse(res);
	return res;
}

//察看字符是否在规定的范围内
int judge_char(char c)
{
	if ( (c>='A' && c<='Z') || (c>='a' && c<='z') || c==' ' || c=='!' || c==',' || c=='.' || c==';' || c==':' || c=='?')
		return 0;
	else
		return 1;
}

char* decode(char * str,char* res)
{
	char j[1024]="",k[1024]="";
	int length,i,res_len=0;
	reverse(str);
	strcpy(k,str);
	length=strlen(str);	

	bzero(res,1024);
	for(i=0;i<length ;i++)
	{
		if(!(k[i]<='9' && k[i]>='0'))
		{
			str++;
			continue;
		}
		strncpy(j,str,2);
		j[2]='\0';
		if(judge_char(atoi(j)))
		{
			strncpy(j,str,3);
			j[3]='\0';
			if(judge_char(atoi(j)))
			{
				exit(1);
			}
			i+=2;
			str+=3;
			res_len++;
			sprintf(res,"%s%c",res,atoi(j));
		}
		else
		{
			i++;
			str+=2;
			res_len++;
			sprintf(res,"%s%c",res,atoi(j));
		}
	}
	res[res_len]='\0';
	return res;
}

int include_dig(char *str)
{
    int i;
    for(i=0;i<strlen(str);i++)
    {
	if(str[i]<='9' && str[i]>='0')
	    return 1;
    }
    return 0;
}

int include_char(char *str)
{
    int i;
    for(i=0;i<strlen(str);i++)
	if(!judge_char(str[i]) && str[i]!=' ')
	    return 1;
    return 0;
}

int main()
{
	char res[1024];
	char* str=(char*)malloc(sizeof(char)*1024);
	bzero(res,1024);
	bzero(str,1024);
	size_t len;
	while(getline(&str,&len,stdin) >0)
	{
		if(include_char(str))
			printf("%s\n",encode(str,res));
		else if(include_dig(str))
			printf("%s\n",decode(str,res));
		else
		{
			printf("%s\n",res);
		}
		bzero(res,1024);
		bzero(str,1024);
	}
	free(str);
	return 0;
}

Code: Select all

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

int main()
{
	char buf[880];
	char tmp[2];
	char tmp2[3];
	int num;
	int i;
	while (fgets(buf, sizeof(buf), stdin))
	{
		buf[strlen(buf)-1] = '\0';
		/*
		while (buf[strlen(buf)-1] == ' ')
			buf[strlen(buf)-1] = '\0';
		*/
		for (i=strlen(buf)-1; i>=0; i--) {
			if (buf[i] >= 48 && buf[i] <= 57) {
				if (buf[i] == '1') {
					tmp2[0] = buf[i--];
					tmp2[1] = buf[i--];
					tmp2[2] = buf[i];
					num = atoi(tmp2);
				} else {
					tmp[0] = buf[i--];
					tmp[1] = buf[i];
					num = atoi(tmp);
				}
				printf("%c", num);
			} else if ((buf[i] >= 65 && buf[i] <=90) || 
				(buf[i]>=97 && buf[i]<=122) || buf[i] ==32 || buf[i]==33 ||
				buf[i]==44 || buf[i]==46 || buf[i]==58 || buf[i]==59 || buf[i]==63)
			{
				if (buf[i] > 99)
					printf("%d%d%d", buf[i]%10, buf[i]/10%10, buf[i]/10/10);
				else
					printf("%d%d", buf[i]%10, buf[i]/10);
			}
		}
		printf("\n");
	}
	return 0;
}

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spy's message is at most 80 characters long,

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return (rev);

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if(len==3){
	if(rev<10)printf("00");
	else if(rev<100)printf("0");
}
else if(len==2){
	if(rev<10)printf("0");
}