#include<iostream.h>
int t[12][2];
int a,b;
void print()
{
    int s,x,y,i;
    s=0;
    for (i=1;i<=8;i++)
    {
    x=t[i][1];
    y=t[i][2];
    if ((b+x>=1) && (b+x<=8) && (a+y>=1) && (a+y<=8)) s++;
    }
    cout<<s<<endl;
}
void in()
{
    t[1][1]=2;t[1][2]=1;
    t[2][1]=1;t[2][2]=2;
    t[3][1]=2;t[3][2]=-1;
    t[4][1]=-1;t[4][2]=2;
    t[5][1]=-2;t[5][2]=1;
    t[6][1]=1;t[6][2]=-2;
    t[7][1]=-1;t[7][2]=-2;
    t[8][1]=-2;t[8][2]=-1;
}
void main()
{
    int n,i,j;
    char p;
    cin>>n;
    in();
    for (i=1;i<=n;i++)
    {
    cin>>p;
    a=int(p)-96;
    cin>>p;
    b=int(p)-48;
    print();
    }
}

#include <stdio.h>

int p[8][8]={2,3,4,4,4,4,3,2,
             3,4,6,6,6,6,4,3,
             4,6,8,8,8,8,6,4,
             4,6,8,8,8,8,6,4,
             4,6,8,8,8,8,6,4,
             4,6,8,8,8,8,6,4,
             3,4,6,6,6,6,4,3,
             2,3,4,4,4,4,3,2};
void main(void)
{
    int N;
    scanf("%i\n",&N);
    for(int i=0;i<N;i++)
    {
        char letter,digit;
        scanf("%c%c\n",&letter,&digit);
        int il,id;
        il=letter-'a'+1;
        id=digit-'0';
        printf("%i\n",p[il-1][id-1]);
    }
}

#include <iostream>

using namespace std;

long mz (long xx,long yy)
{
     if ((xx<1)||(xx>8)) return (0);
     if ((yy<1)||(yy>8)) return (0);
     return (1);
}

int main ()
{
    long n;
    char str[100];
    long x,y,xx,yy;
    long i,total;
    cin>>n;
    for (i=0;i<n;i++)
        {
        cin>>str;
        total=0;
        x=(long)(str[0])-96;
        y=(long)(str[1])-48;
        xx=x+2;
        yy=y+1;
        if (mz(xx,yy)) total++;
        xx=x-2;
        yy=y+1;
        if (mz(xx,yy)) total++;
        xx=x-2;
        yy=y-1;
        if (mz(xx,yy)) total++;
        xx=x+2;
        yy=y-1;
        if (mz(xx,yy)) total++;
        xx=x+1;
        yy=y+2;
        if (mz(xx,yy)) total++;
        xx=x-1;
        yy=y+2;
        if (mz(xx,yy)) total++;
        xx=x-1;
        yy=y-2;
        if (mz(xx,yy)) total++;
        xx=x+1;
        yy=y-2;
        if (mz(xx,yy)) total++;
        cout<<total<<endl;
        }
    return (0);
}
这个比较罗嗦的

pls can somebody tell me why i got compilation error on this code

#include <stdio.h>
#include <stdlib.h>

inline int numberOfAttackedFields(int x, int y)
{
    int i = 0;
    if (x - 1 > 0 && y - 2 > 0)
    {
        i++;
    }

    if (x + 1 < 9 && y - 2 > 0)
    {
        i++;
    }

    if (x + 2 < 9 && y - 1 > 0)
    {
        i++;
    }

    if (x + 2 < 9 && y + 1 < 9)
    {
        i++;
    }

    if (x + 1 < 9 && y + 2 < 9)
    {
        i++;
    }

    if (x - 1 > 0 && y + 2 < 9)
    {
        i++;
    }

    if (x - 2 > 0 && y + 1 < 9)
    {
        i++;
    }

    if (x - 2 > 0 && y - 1 > 0)
    {
        i++;
    }
    return i;
}

int main(void)
{
    int x, y, n;
    char input[3];
    char firstLetter;
    scanf("%d", &n);
    for (int i = 0; i < n; i++)
    {
        scanf("%s", input);
        input[2] = '\0';

        firstLetter = input[0];

        //lower case
        if (firstLetter - 'a' >= 0 && firstLetter - 'a' <= 8)
        {
            x = firstLetter - 'a' + 1;
        }
        //upper case
        else
        {
            x = firstLetter - 'A' + 1;
        }

        //replace the first letter with 0
        input[0] = '0';
        y = atoi(input);
        printf("x=%d y=%d\t%d\n", x, y, numberOfAttackedFields(x, y));
    }

    return 0;
}

it compiles with no problems on my MAC. I recieve compilation error on any code I submit! But no problems on my side.

(...)
int main()
{
    int t;

    scanf("%d",&t);
    getchar();
    while(t--){
        char a[10];
        scanf("%s", a);
        int count = 0;
        if(a[0]-96-2>0 && a[1]-48-2>0) count+=2;
        else{
            if(a[0]-96-1>0 && a[1]-48-2>0) count+=1;
            if(a[0]-96-2>0 && a[1]-48-1>0) count+=1;
        }

        if(a[0]-96+2<9 && a[1]-48-2>0) count+=2;
        else{
            if(a[0]-96+1<9 && a[1]-48-2>0) count+=1;
            if(a[0]-96+2<9 && a[1]-48-1>0) count+=1;
        }

        if(a[0]-96-2>0 && a[1]-48+2<9) count+=2;
        else{
            if(a[0]-96-1>0 && a[1]-48+2<9) count+=1;
            if(a[0]-96-2>0 && a[1]-48+1<9) count+=1;
        }

        if(a[0]-96+2<9 && a[1]-48+2<9) count+=2;
        else{
            if(a[0]-96+1<9 && a[1]-48+2<9) count+=1;
            if(a[0]-96+2<9 && a[1]-48+1<9) count+=1;
        }

        cout<<count<<endl;
    }

    return 0;
}

program Project1;
{$APPTYPE CONSOLE}
uses
  SysUtils;
var
   i,j:integer;
   kolvo, x,y,otvet: longint;
   koord:string;
   alpha:string;
begin
{$IFNDEF ONLINE_JUDGE}
   assign(input, 'input.txt');
   reset(input);
   assign(output, 'output.txt');
   rewrite(output);
{$ENDIF}

  alpha:='abcdefgh';

  readln(kolvo);
  //ff

  for i:=1 to kolvo do
        begin
         otvet:=0;
        readln(koord);
        for j:=1 to 8 do
          if koord[1]=alpha[j] then  y:=j;
          x:=strtoint(koord[2]);


        if ((x-2)>=1) and ((y-1)>=1) then otvet:=otvet+1;
        if ((x-1)>=1) and ((y-2)>=1) then otvet:=otvet+1;

        if ((x-2)>=1) and ((y+1)<=8) then otvet:=otvet+1;
        if ((x-1)>=1) and ((y+2)<=8) then otvet:=otvet+1;

        if ((x+2)<=8) and ((y-1)>=1) then otvet:=otvet+1;
        if ((x+1)<=8) and ((y-2)>=1) then otvet:=otvet+1;

        if ((x+2)<=8) and ((y+1)<=8) then otvet:=otvet+1;
        if ((x+1)<=8) and ((y+2)<=8) then otvet:=otvet+1;

        writeln(otvet);

        end;

{$IFNDEF ONLINE_JUDGE}
   close(input);
   close(output);
{$ENDIF}
end.

#include <iostream>
#include <stdio.h>
#include <vector>

using namespace std;

class Place {
public:
    char x;
    int y;

    bool isOnboard() {
        if (x < 'a' || x > 'h' || y < 1 || y > 8) return false;
        return true;
    }



    Place(char x, int y) {
        this->x = x;
        this->y = y;
    }

};



int main(int argc, const char * argv[])
{
    int N;
    cin >> N;


    vector<Place> places;

    for (int i = 0; i < N; i++) {
        char x;
        int y;
        cin.get(x);

        if (x == '\n') {
            i--;
            continue;
        }

        cin >> y;

        Place place (x, y);
        places.push_back(place);

    }


    for (int i = 0; i < N; i++) {
        Place place = places[i];
        int moves = 0;


        //left 2 up 1
        place.x -= 2;
        place.y -= 1;
        moves += place.isOnboard();

        //left 2 down 1
        place.y += 2;
        moves += place.isOnboard();

        //right 2 down 1
        place.x += 4;
        moves += place.isOnboard();
        //right 2 up 1
        place.y -= 2;
        moves += place.isOnboard();

        //right 1 up 2
        place.x -= 1;
        place.y -= 1;
        moves += place.isOnboard();

        //left 1 up 2
        place.x -= 2;
        moves += place.isOnboard();

        //left 1 down 2
        place.y += 4;
        moves += place.isOnboard();

        //right 1 down 2
        place.x += 2;
        moves += place.isOnboard();

        cout << moves << endl;

    }



}

Edited by author 24.01.2014 20:05

This is simply a bruteforce solution, but it is pretty clear though. ;)

#include <iostream>
using namespace std;
int check(int r,int c)
{
    int counter=0;
    if((r-1)>=0&&(c-2)>=0) counter++;
    if((r-1)>=0&&(c+2)<=7) counter++;
    if((r+1)<=7&&(c-2)>=0) counter++;
    if((r+1)<=7&&(c+2)<=7) counter++;
    if((c-1)>=0&&(r+2)<=7) counter++;
    if((c-1)>=0&&(r-2)>=0) counter++;
    if((c+1)<=7&&(r-2)>=0) counter++;
    if((c+1)<=7&&(r+2)<=7) counter++;
    return counter;
}
int main()
{
   char v;
   int h,i,vint,n;
   cin >> n;
   for(i=0;i<n;i++)
   {
   cin >> v>>h;
   h--;
   vint=int(v)-97;
   cout<<check(h,vint)<<endl;
   }
}