C/Data Type/Array Two Dimension

Содержание

1 applying sizeof( ) to determine an array"s size
2 A simple student grades database
3 A simple Tic Tac Toe game
4 A very simple text editor
5 English to German Translator
6 Find element inside a two dimensional array
7 For loop: two dimensional array
8 Getting the values in a two-dimensional array
9 Multi-dimensional arrays and pointers
10 Store value into two dimensional char array and output it
11 the use of a two-dimensional array
12 Two-Dimensional arrays
13 Two dimensional char array and for loop
14 Two dimensional int array

applying sizeof( ) to determine an array"s size

include <stdio.h>
define iDAYS_OF_WEEK 7

int main( ) {

int arr[iDAYS_OF_WEEK]={1,2,3,4,5,6,7};
printf(" %d ",(int)sizeof(arr));
return(0);

}

 </source>

A simple student grades database

include <stdio.h>
include <ctype.h>
include <stdlib.h>
define CLASSES 3
define GRADES 2

int grade[CLASSES][GRADES]; void enter_grades(void); int get_grade(int num); void disp_grades(int g[][GRADES]); int main(void) {

 char ch, str[80];
 enter_grades();
 disp_grades(grade);
 return 0;

} void enter_grades(void) {

 int t, i;
 char s[80];
 for(t=0; t<CLASSES; t++) {
   printf("Class # %d:\n", t+1);
   for(i=0; i<GRADES; ++i)
     grade[t][i] = atoi(gets(s));
 }

} void disp_grades(int g[][GRADES]) {

 int t, i;
 for(t=0; t<CLASSES; ++t) {
   printf("Class # %d:\n", t+1);
   for(i=0; i<GRADES; ++i)
     printf("Student #%d is %d\n", i+1, g[t][i]);
 }

}

      </source>

A simple Tic Tac Toe game

<source lang="cpp"> /* C: The Complete Reference, 4th Ed. (Paperback) by Herbert Schildt ISBN: 0072121246 Publisher: McGraw-Hill Osborne Media; 4 edition (April 26, 2000)

/

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

char matrix[3][3]; /* the tic tac toe matrix */ char check(void); void init_matrix(void); void get_player_move(void); void get_computer_move(void); void disp_matrix(void); int main(void) {

 char done;
 printf("This is the game of Tic Tac Toe.\n");
 printf("You will be playing against the computer.\n");
 done =  " ";
 init_matrix();
 do {
   disp_matrix();
   get_player_move();
   done = check(); /* see if winner */
   if(done!= " ") break; /* winner!*/
   get_computer_move();
   done = check(); /* see if winner */
 } while(done== " ");
 if(done=="X") printf("You won!\n");
 else printf("I won!!!!\n");
 disp_matrix(); /* show final positions */
 return 0;

} /* Initialize the matrix. */ void init_matrix(void) {

 int i, j;
 for(i=0; i<3; i++)
   for(j=0; j<3; j++) matrix[i][j] =  " ";

} /* Get a player"s move. */ void get_player_move(void) {

 int x, y;
 printf("Enter X,Y coordinates for your move: ");
 scanf("%d%*c%d", &x, &y);
 x--; y--;
 if(matrix[x][y]!= " "){
   printf("Invalid move, try again.\n");
   get_player_move();
 }
 else matrix[x][y] = "X";

} /* Get a move from the computer. */ void get_computer_move(void) {

 int i, j;
 for(i=0; i<3; i++){
   for(j=0; j<3; j++)
     if(matrix[i][j]==" ") break;
   if(matrix[i][j]==" ") break;
 }
 if(i*j==9)  {
   printf("draw\n");
   exit(0);
 }
 else
   matrix[i][j] = "O";

} /* Display the matrix on the screen. */ void disp_matrix(void) {

 int t;
 for(t=0; t<3; t++) {
   printf(" %c | %c | %c ",matrix[t][0],
           matrix[t][1], matrix [t][2]);
   if(t!=2) printf("\n---|---|---\n");
 }
 printf("\n");

} /* See if there is a winner. */ char check(void) {

 int i;
 for(i=0; i<3; i++)  /* check rows */
   if(matrix[i][0]==matrix[i][1] &&
      matrix[i][0]==matrix[i][2]) return matrix[i][0];
 for(i=0; i<3; i++)  /* check columns */
   if(matrix[0][i]==matrix[1][i] &&
      matrix[0][i]==matrix[2][i]) return matrix[0][i];
 /* test diagonals */
 if(matrix[0][0]==matrix[1][1] &&
    matrix[1][1]==matrix[2][2])
      return matrix[0][0];
 if(matrix[0][2]==matrix[1][1] &&
    matrix[1][1]==matrix[2][0])
      return matrix[0][2];
 return " ";

}

      </source>

A very simple text editor

include <stdio.h>
define MAX 100
define LEN 80

char text[MAX][LEN]; int main(void) {

 register int t, i, j;
 printf("Enter an empty line to quit.\n");
 for(t = 0; t < MAX; t++) {
   printf("%d: ", t);
   gets(text[t]);
   if(!*text[t]) 
       break; /* quit on blank line */
 }
 for(i = 0; i < t; i++) {
   for(j = 0; text[ i ][ j ]; j++) 
       putchar(text[ i ][ j ]);
   putchar("\n");
 }
 return 0;

}

      </source>

English to German Translator

include <stdio.h>
include <string.h>

char words[][2][40] = {

 "dog", "Hund",
 "no", "nein",
 "year", "Jahr",
 "child", "Kind",
 "I",  "Ich",
 "",""

}; int main(void) {

 char english[80];
 int i;
 printf("Enter English word: ");
 gets(english);
 /* look up the word */
 i = 0;
 /* search while null string not yet encountered */
 while(strcmp(words[i][0], "")) {
   if(!strcmp(english, words[i][0])) {
     printf("German translation: %s", words[i][1]);
     break;
   }
   i++;
 }
 if(!strcmp(words[i][0], ""))
   printf("Not in dictionary\n");
 return 0;

}

      </source>

Find element inside a two dimensional array

include <stdio.h>

int main(void) {

 int maps[5][2] = {
   1, 14,
   2, 28,
   3, 19,
   4, 8,
   5, 15
 };
 int key;
 int i;
 printf("Enter the key: ");
 scanf("%d", &key);
 /* look it up in the table */
 for(i = 0; i < 5; i++)
   if(key == maps[ i ][ 0 ]) {
     printf("Key %d value pair to %d.\n",
            maps[ i ][ 1 ], key);
     break;
   }
 /* report error if not found */
 if(i == 5) 
     printf("value not listed.\n");
 return 0;

}

      </source>

For loop: two dimensional array

include <stdio.h>

int main(void) {

 int arr[4][5];
 int i, j;
 for(i = 0; i < 4; i++)
   for(j = 0; j < 5; j++)
     arr[ i ][ j ] = i * j;
 for(i = 0; i < 4; i++) {
   for(j = 0; j < 5; j++)
     printf("%d ", arr[ i ][ j ]);

   printf("\n");
 }
 return 0;

}

      </source>

Getting the values in a two-dimensional array

include <stdio.h>

void main() {

  int i = 0;        /* Loop counter */
  char t[3][3] = {
                       {"1","2","3"},
                       {"4","5","6"},
                       {"7","8","9"}
                     };
  /* List all elements of the array */
  for(i = 0; i < 9; i++)
    printf(" t: %c\n", *(*t + i));

}

      </source>

Multi-dimensional arrays and pointers

include <stdio.h>

void main() {

  int i = 0;                /* Loop counter      */
  char t[3][3] = {
                       {"1","2","3"},
                       {"4","5","6"},
                       {"7","8","9"}
                     };
  char *pointer = *t;   /* A pointer to char */
  for(i = 0; i < 9; i++)
    printf(" t: %c\n", *(pointer + i));

}

      </source>

Store value into two dimensional char array and output it

include <stdio.h>

int main(void) {

 char text[10][80];
 int i;
 for(i = 0; i < 10; i++) {
   printf("some string for index %d: ", i + 1);
   
   gets(text[ i ]);
 }
 do {
   printf("Enter number of string (1 - 10) : ");
   scanf("%d", &i);
   i--;  /* adjust value to match array index */
   if(i >= 0 && i < 10) 
       printf("%s\n", text[i]);
 } while(i>=0);
 return 0;

}

      </source>

the use of a two-dimensional array

include <stdio.h>
define iROWS 4
define iCOLUMNS 5

int main( ) {

int irow;
int icolumn;
int istatus[iROWS][iCOLUMNS];
int iadd;
int imultiple;
for(irow=0; irow < iROWS; irow++)
  for(icolumn=0; icolumn < iCOLUMNS; icolumn++) {
    iadd = iCOLUMNS - icolumn;
    imultiple = irow;
    istatus[irow][icolumn] = (irow+1) *
      icolumn + iadd * imultiple;
  }
for(irow=0; irow<iROWS; irow++) {
  printf("CURRENT ROW: %d\n",irow);
  printf("RELATIVE DISTANCE FROM BASE:\n");
  for(icolumn=0; icolumn<iCOLUMNS; icolumn++)
    printf(" %d ",istatus[irow][icolumn]);
  printf("\n\n");
}
return(0);

}

 </source>

Two-Dimensional arrays

include <stdio.h>

void main() {

  char t[3][3] = {
                       {"1","2","3"},
                       {"4","5","6"},
                       {"7","8","9"}
                     };
  printf("value of t[0][0] : %c\n", t[0][0]);
  printf("value of t[0]    : %c\n", *t[0]);
  printf("value of t       : %c\n", **t);

}

      </source>

Two dimensional char array and for loop

include <stdio.h>

int main(void) {

 char text[][80] = {
   "1", "2", "3",
   "4", "5", "6",
   "7", ""
 };
 int i, j;
 /* now, display them */
 for(i = 0; text[ i ][ 0 ]; i++) {
   for(j = 0; text[ i ][ j ]; j++)
     printf("%c", text[ i ][ j ]);
   printf(" ");
 }
 return 0;

}

      </source>

Two dimensional int array

include <stdio.h>

int main(void) {

 int t, i, num[3][4];
 for(t = 0; t < 3; ++t)
   for(i = 0; i < 4; ++i)
     num[ t ][ i ] = ( t * 4 ) + i + 1;
 /* now print them out */
 for(t = 0; t < 3; ++t) {
   
   for(i = 0; i < 4; ++i)
     printf("%3d ", num[ t ][ i ]);
   
   printf("\n");
 }
 return 0;

}

      </source>

C/Data Type/Array Two Dimension

Содержание

applying sizeof( ) to determine an array"s size

A simple student grades database

A simple Tic Tac Toe game

A very simple text editor

English to German Translator

Find element inside a two dimensional array

For loop: two dimensional array

Getting the values in a two-dimensional array

Multi-dimensional arrays and pointers

Store value into two dimensional char array and output it

the use of a two-dimensional array

Two-Dimensional arrays

Two dimensional char array and for loop

Two dimensional int array

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