brainfuck

/阅读这样的代码就像在强奸你的大脑

#include<stdio.h>

#include<ctype.h>

#include<stdlib.h>

 #include<string.h>

char br[10000];

 

int main()

{

    char *eip = br;

    printf("请输入想解密的brainfuck代码\n");

    scanf("%s",br);

    printf("\n解密得到的flag\n\n");

    char *mem = (char*)malloc(100);

    char *ptr = mem;

    bool isright = true;

    while(*eip != 0)

    {

        if(*eip == '[')

        {

            while(*eip!=0 && *eip!=']')

                ++eip;

            if(*eip == 0)

                isright = false;

        }

        else if(*eip == ']')

            isright = false;

 

        if(!isright)

        {

            printf("The brainfuck code has some wrong!\n");

            return 0;

        }

        ++eip;

    }

 

    memset(ptr,0,100);

 

    eip = br;

 

    do

    {

        switch(*eip)

        {

        case '>':

            ++ptr;

            break;

        case '<':

            --ptr;

            break;

        case '+':

            ++*ptr;

            break;

        case '-':

            --*ptr;

            break;

        case '.':

            putchar(*ptr);

            break;

        case ',':

            *ptr = getchar();

            break;

        case '[':

            if(*ptr == 0)

            {

                do

                {

                    ++eip;

                }while(*eip!=']');

            }

            break;

        case ']':

            if(*ptr != 0)

            {

                do

                {

                    --eip;

                }while(*eip!='[');

            }

            break;

        }

        if( (ptr-mem)>100)

        {

            printf("Stack overflow!\n");

            break;

        }

        ++eip;

    }while(*eip!=0);

    free(mem);

    return 0;

}