杭电1002

[Evan_Z]

#include <iostream>
#include <cstring>
using namespace std;
class INT
{ char *p_buf; //从低位到高位存储整型数，
int buf_len; //p_buf所占空间大小（为10 的倍数）
public :
INT(char *num);
void Add(const INT &i); //把i加到*this中
INT& operator =(const INT &i);
~INT();
ostream &operator<<(ostream &out);
};
INT::INT(char *num)
{
buf_len = (strlen(num)/10+1)*10;
p_buf = new char[buf_len+1];
for (int i=0,j=strlen(num)-1; j>=0; i++,j--)
p_buf[i] = num[j];
p_buf[i] = '\0';
}
INT::~INT()
{
delete []p_buf;
p_buf = NULL;
buf_len = 0;
}
INT& INT::operator =(const INT &i)
{
if (buf_len < i.buf_len)
{
delete []p_buf;
buf_len = i.buf_len;
p_buf = new char[buf_len+1];
}
strcpy(p_buf, i.p_buf);
return *this;
}
void INT::Add(const INT &i) //绝对值加
{
int len1=strlen(p_buf);
int len2=strlen(i.p_buf);
int buf_len1=(((len1>len2?len1:len2)+1)/10+1)*10;
if (buf_len1 > buf_len)
{
char *p_buf1=new char[buf_len1+1];
strcpy(p_buf1,p_buf);
delete []p_buf;
p_buf = p_buf1;
buf_len = buf_len1;
}
char *p1,*p2; //p1 指向长的数，p2 指向短的数
if (len1 >= len2)
{
p1 = p_buf;
p2 = i.p_buf;
}
else
{
p1 = i.p_buf;
p2 = p_buf;
}
int carry=0, sum;
char *p=p_buf;
//处理公共长度部分
while (*p2 != '\0')
{
sum = (*p1-'0')+(*p2-'0')+carry;
if (sum >= 10)
{
carry = 1;
*p = (sum-10)+'0';
}
else
{
carry = 0;
*p = sum+'0';
}
p1++; p2++; p++;
}
//处理较大整数的剩余部分
while (*p1 != '\0')
{
if (carry == 0)
*p = *p1;
else
{
sum = (*p1-'0')+carry;
if (sum >= 10)
{ carry = 1;
*p = (sum-10)+'0';
}
else
{
carry = 0;
*p = sum+'0';
}
}
p1++; p++;
}
if (carry != 0) //最后检查是否还有进位，若有就放入和的最高位
{
*p = '1';
p++;
}
*p = '\0';
}
ostream& INT::operator<<(ostream &out)
{
for (int j=strlen(this->p_buf)-1; j>=0; j--)
out<<this->p_buf[j];
return out;
}
int main()
{
int n;
cin>>n;
static int count=1;
char* num1=new char[1000];
char* num2=new char[1000];
for (int i=0;i<n;i++)
{
cin>>num1>>num2;
INT n1(num1),n2(num2);
n1.Add(n2);
cout<<"Case "<<count<<":\n";
cout<<num1<<" + "<<num2<<" = ";
n1.operator <<(cout);
cout<<endl<<endl;
count++;
}
return 0;
}
Presentation Error，格式哪儿有误吗？

[rendao0563]

无误

[Evan_Z]

但是不知道为什么通不过

[hsdyl]

我也有这个问题 写了个一起输入输出的 但是 Presentation Error
http://topic.csdn.net/u/20100508/10/887d5dab-acd7-4910-8185-fa9ed0123142.html?seed=1202038373&r=65267848