16진수를 나타내는 문자열을 입력하고 10진수로 변환하는 정수 출력을 입력하십시오.

/***********************************************************************************
 16         10  
1.    0x     0x   
2.       32    ， 16   FFFF，  4    ，    ，     0
3.     strtol         16     
************************************************************************************/
#include
#include
#include
/*            */
int GetLeghtofHEX(char *p)
{
    int count=0;
	char *temp =p;
	while(*temp++!='\0')
		count++;
	return count ;
}
/*        ， 4-count  0*/
char *modifbit(char *p)
{   
	char tab[5];
	int i=0,j=0;
	char * temp;
	int count=GetLeghtofHEX(p);
    if (count!=4)
	{
		for(i=0;i<4-count;i++)
			tab[i]='0';
		while(i<4)
		{
			tab[i]=*(p+j);
			j++;
			i++;
		}
		tab[i]='\0';
		temp = tab;
		
	}
	else
		temp=p;
    return temp;
}
 /*  16   10          */
int Hexstoinit(char *p)
{
    int i,j=0;
    char string[5]="0000";
	int Dec=0,temp;
	char *tempoint=p;
	char *temp2;
	if(strstr(p,"0x"))
	{
       tempoint=strstr(p,"0x")+2;
	}
    printf("string=%s
",tempoint);
	temp2=modifbit(tempoint);
   //printf("count=%s
",temp2);
	tempoint=temp2;
    for(i=3;i>=0;i--)
	{
		string[j++]=*(tempoint+i);
	}
	string[4]='\0' ;
	
	printf("string1=%s
",string);
	for(j=0;j<4;j++)
	{
		if(string[j]<='9')
		{
         temp=string[j]-'0';
		}
		else if(string[j]=='a'||string[j]=='A')
			temp=10;
		else if(string[j]=='b'||string[j]=='B')
			temp=11;
		else if(string[j]=='c'||string[j]=='C')
			temp=12;
		else if(string[j]=='d'||string[j]=='D')
			temp=13;
		else if(string[j]=='e'||string[j]=='E')
			temp=14;
		else if(string[j]=='f'||string[j]=='F')
			temp=15;
		
		Dec+=temp*pow(16,j);
	}
	printf("string=%d
",Dec);
	return Dec;
}
void main()
{
  //printf("the Hextoint is %d
",strtol("0xff",NULL,16));
	printf("the Hextoint is %d
",Hexstoinit("fff"));
	
	
}