紫书第三章训练1 D - Crossword Answers

A crossword puzzle consists of a rectangular grid of black and white squares and two lists of definitions (or descriptions).
One list of definitions is for ``words" to be written left to right across white squares in the rows and theother list is for words to be written down white squares in the columns. (A word is a sequence of alphabetic characters.)
To solve a crossword puzzle, one writes the words corresponding to the definitions on the white squares of the grid.

The definitions correspond to the rectangular grid by means of sequential integers on eligible" white squares. White squares with black squaresimmediately to the left or above them areeligible." White squares with nosquares either immediately to the left or above are also ``eligible." No othersquares are numbered. All of the squares on the first row are numbered.
The numbering starts with 1 and continues consecutively across white squares of the first row, then across the eligible white squares of the second row, then across the eligible white squares of the third row and so on across all of the rest of the rows of the puzzle. The picture below illustrates a rectangular crossword puzzle grid with appropriate numbering.

An across" word for a definition is written on a sequence of white squares ina row starting on a numbered square that does not follow another white square in the same row. The sequence of white squares for that word goes across the row of the numbered square, ending immediately before the next black square in the row or in the rightmost square of the row. Adown" word for a definition is written on a sequence of white squares in acolumn starting on a numbered square that does not follow another white square in the same column.
The sequence of white squares for that word goes down the column of the numbered square, ending immediately before the next black square in the column or in the bottom square of the column.
Every white square in a correctly solved puzzle contains a letter.
You must write a program that takes several solved crossword puzzles as input and outputs the lists of across and down words which constitute the solutions.
Input
Each puzzle solution in the input starts with a line containing two integers rand c ( and ), where r (the first number) is the number ofrows in the puzzle and c (the second number) is the number of columns.
The rrows of input which follow each contain c characters (excluding the end-of-line) which describe the solution. Each of those c characters is an alphabeticcharacter which is part of a word or the character *", which indicates ablack square. The end of input is indicated by a line consisting of the single number 0. Output Output for each puzzle consists of an identifier for the puzzle (puzzle #1:,puzzle #2:, etc.) and the list of across words followed by the list of downwords. Words in each list must be output one-per-line in increasing order of the number of their corresponding definitions. The heading for the list of across words isAcross". The heading for the list of down words is ``Down".
In the case where the lists are empty (all squares in the grid are black), the Across and Down headings should still appear.
Separate output for successive input puzzlesby a blank line.
Sample Input
2 2
AT
O
6 7
AIMDEN
MEONE
UPONTO
SOERIN
SAOR
IESDEA
0
Sample Output
puzzle #1:
Across
1.AT
3.O
Down
1.A
2.TO

puzzle #2:
Across
1.AIM
4.DEN
7.ME
8.ONE
9.UPON
11.TO
12.SO
13.ERIN
15.SA
17.OR
18.IES
19.DEA
Down
1.A
2.IMPOSE
3.MEO
4.DO
5.ENTIRE
6.NEON
9.US
10.NE
14.ROD
16.AS
18.I
20.A

这个不是我们杂志后面的填字游戏，这个东西据说是从英国传过来的。意思根据题一看都懂，而且输出大家也都会，只是个循环控制。关键就是其编号，这个编号我想的挺久的，当时还是蛮蒙逼的。找规律，呸，就是看图，你编号的都是有字母的，然后就是按照先行后列的顺序，什么时候需要编号呢，就是在单词开始的地方啊，什么时候开始，首先左上边界上的可能会越界，你可以特判，这只要是是字母一定是要排序的，往右往下走，这个顺序上你到了下一状态是要考虑它上面和它左边，只有不是字母才有序，因为是开始啊。综上，开始只能是左上边界，和左面上面都是*的，接下来就很简单了
AC代码

#include <stdio.h>
int main()
{char s[15][15];
int m,n,cas=0;
while(scanf("%d",&m),m){
    if(cas)printf("\n");
    int a[15][15]={0};
    scanf("%d",&n);
    for(int i=1;i<=m;i++)
    scanf("%s",s[i]);
    int f=1;  
    for(int i=1;i<=m;i++){  
    for(int j=0;j<n;j++){  
    if(s[i][j]!= '*'){  
    if(i==1||j==0)  
    a[i][j]=f++;  
    else{  
    if(s[i-1][j]=='*'||s[i][j-1]== '*')  
    a[i][j]=f++;}}}}
    printf("puzzle #%d:\nAcross\n",++cas);
    for(int i=1;i<=m;i++){  
    for(int j=0;j<n;j++)
    if(a[i][j]){
        printf("%3d.",a[i][j]);
        for(;j<n;j++)
        if(s[i][j]=='*')
        break;
        else
        printf("%c",s[i][j]);
        printf("\n");
    }}
    printf("Down\n");
    for(int i=1;i<=m;i++){  
    for(int j=0;j<n;j++) 
    if(a[i][j]&&(i==1||s[i-1][j]=='*')){
        printf("%3d.",a[i][j]);
        for(f=i;f<=m;f++)
        if(s[f][j]=='*')
        break;
        else
        printf("%c",s[f][j]);
        printf("\n");
    }}
} 
    
    return 0;
}

转载于:https://www.cnblogs.com/BobHuang/p/6782634.html