#include 
    

int main(void)

{

char *shex = "000f000f";

int idec =0;

int i,mid;

int len = strlen(shex);

printf("%d\n",len);

if(len>8)

return 0;

mid = 0;

idec =0;

for(i =0;i

{

if(shex[i] >='0'&& shex[i]<='9')

mid = shex[i]-'0';

else if(shex[i]>='a'&& shex[i]<='f')

mid= shex[i]-'a'+10;

else if(shex[i]>='A'&&shex[i]<='F')

mid = shex[i]-'A'+10;

else

return 0; //32位一次取得4位 //当i等0时读取的是最高位，所以要右移7*2*2 6*2*2 5*2*2 4*2*2....

mid <<= ((len-i-1)<<2);

idec = idec+mid;

}

printf("%d\n",idec);

fprintf(stdout,"%d",idec);

return 1;

}