UVA424-Integer Inquiry

Link: UVA424

To solve the problem of adding large numbers, just simulate the manual calculation. For details, refer to the Code:

 #include<iostream>   #include<cstdio>   #include<cstring>   using namespace std;  char number[255]={'0'};  int answer[260]={0};  void reverse(char* pointer);  int main()  {      int maxIndex=0;      while(scanf("%s",number)&&strcmp(number, "0"))      {          int length=strlen(number);          reverse(number);          int index;          int carryBit=0;          for(index=0;index<length;index++)          {              carryBit=answer[index]+(number[index]-'0')+carryBit;              answer[index]=carryBit%10;              carryBit=carryBit/10;          }          while(carryBit)          {              carryBit=answer[index]+carryBit;              answer[index++]=carryBit%10;              carryBit=carryBit/10;          }          if(index>maxIndex)              maxIndex=index;      }      int flag=1;      for(int i=maxIndex;i>0;i--)      {          if(flag)          {              if(answer[i])              {                  cout<<answer[i];                  flag=0;              }          }          else              cout<<answer[i];      }      cout<<answer[0]<<endl;      memset(number,'0',255);      return 0;  }  void reverse(char* pointer)  {      int length=strlen(pointer);      char temp;      for(int i=0,j=length-1;i<j;i++,j--)      {          temp=pointer[i];          pointer[i]=pointer[j];          pointer[j]=temp;      }  }