diamond_numbers_pattern_v1.c

/*

    diamond_numbers_pattern_v1.c

 Diamond star pattern with abs().

 n is the number of stars in the upper triangle of diamond.

 Diamond will have 2*n-1 raws.

 Example: n = 4

------*-
----*-*-*-
--*-*-*-*-*-
*-*-*-*-*-*-*-
--*-*-*-*-*-
----*-*-*-
------*-

row  spaces     *          r

 0.     6       1         -3
 1.     4       3         -2
 2.     2       5         -1
 3.     0       7          0
 4.     2       5          1
 5.     4       3          2
 6.     6       1          3

*/

#include "stdio.h"
#include "stdlib.h"     // for function abs()

/*
---*
--***
-*****
*******
-*****
--***
---*
*/
void diamond_of_stars_v11(int n){
// n - number of rows in upper triangle of diamond

    int r, c;   // r - row, c - column

    for (r = -n+1; r < n; r++){                 // loop for rows
        for (c = 0; c < abs(r); c++)            // print "-"
            printf("-");

        for (c = 0; c < 2*(n-abs(r))-1; c++)    // print "*"
            printf("*");

        printf("\n");                           // new row
    }
}

/*
*********
****-****
***---***
**-----**
*-------*
**-----**
***---***
****-****
*********
*/
void hollow_diamond_of_stars_v11(int n){
// n - number of rows in upper triangle of diamond

    int r, c;   // r - row, c - column

    for (r = -n; r <= n; r++){                  // loop for rows
        for (c = 0; c <= abs(r); c++)           // print "*"
            printf("*");

        for (c = 0; c < 2*(n-abs(r))-1; c++)    // print "-"
            printf("-");

        for (c = 0; c <= abs(r); c++)           // print "*"
            if( (r==-n || r==n) && c > n-1 )
                ;                               // do nothing
            else
                printf("*");

        printf("\n");                           // new row
    }
}

/*
------*-
----*-*-*-
--*-*-*-*-*-
*-*-*-*-*-*-*-
--*-*-*-*-*-
----*-*-*-
------*-
*/
void diamond_of_stars_v12(int n){
// n - number of rows in upper triangle of diamond

    int r, c;   // r - row, c - column

    for (r = -n+1; r < n; r++){                 // loop for rows
        for (c = 0; c < abs(r); c++)            // print "--"
            printf("--");

        for (c = 0; c < 2*(n-abs(r))-1; c++)    // print "*-"
            printf("*-");

        printf("\n");                           // new row
    }
}

/*
* * * * * * * * *
* * * * - * * * *
* * * - - - * * *
* * - - - - - * *
* - - - - - - - *
* * - - - - - * *
* * * - - - * * *
* * * * - * * * *
* * * * * * * * *
*/
void hollow_diamond_of_stars_v12(int n){
// n - number of rows in upper triangle of diamond

    int r, c;   // r - row, c - column

    for (r = -n; r <= n; r++){                  // loop for rows
        for (c = 0; c <= abs(r); c++)           // print "* "
            printf("* ");

        for (c = 0; c < 2*(n-abs(r))-1; c++)    // print "- "
            printf("- ");

        for (c = 0; c <= abs(r); c++)           // print "* "
            if( (r==-n || r==n) && c > n-1 )
                ;                               // do nothing
            else
                printf("* ");

        printf("\n");                           // new row
    }
}

/*
---1
--121
-12321
1234321
-12321
--121
---1
*/
void diamond_of_numbers_v211(int n){
// n - number of rows in upper triangle of diamond
    int r, c, num;  // r - row, c - column, num - current number

    for (r = -n+1; r < n; r++){                 // loop for all rows of the diamond
        for (c = 0; c < abs(r); c++)            // print blanks "-"
            printf("-");

        num = 1;

        for (c = 0; c < 2*(n-abs(r))-1; c++){   // print numbers
            if( c < n-abs(r)-1 )
                printf("%d", num++);
            else
                printf("%d", num--);
        }

        printf("\n");                           // new row
    }
}

/*
---4
--434
-43234
4321234
-43234
--434
---4
*/
void diamond_of_numbers_v212(int n){
// n - number of rows in upper triangle of diamond
    int r, c, num;  // r - row, c - column, num - current number

    for (r = -n+1; r < n; r++){                 // loop for all rows of the diamond
        for (c = 0; c < abs(r); c++)            // print blanks "-"
            printf("-");

        num = n;

        for (c = 0; c < 2*(n-abs(r))-1; c++){   // print numbers
            if( c < n-abs(r)-1 )
                printf("%d", num--);
            else
                printf("%d", num++);
        }

        printf("\n");                           // new row
    }
}

/*
------1-
----1-2-1-
--1-2-3-2-1-
1-2-3-4-3-2-1-
--1-2-3-2-1-
----1-2-1-
------1-
*/
void diamond_of_numbers_v221(int n){
// n - number of rows in upper triangle of diamond
    int r, c, num;  // r - row, c - column, num - current number

    for (r = -n+1; r < n; r++){                 // loop for all rows of the diamond
        for (c = 0; c < abs(r); c++)            // print blanks "--"
            printf("--");

        num = 1;

        for (c = 0; c < 2*(n-abs(r))-1; c++){   // print numbers
            if( c < n-abs(r)-1 )
                printf("%d-", num++);
            else
                printf("%d-", num--);
        }

        printf("\n");                           // new row
    }
}

/*
------1-
----1-2-1-
--1-2-3-2-1-
1-2-3-4-3-2-1-
--1-2-3-2-1-
----1-2-1-
------1-
*/
void diamond_of_numbers_v222(int n){
// n - number of rows in upper triangle of diamond
    int r, c, num;  // r - row, c - column, num - current number

    for (r = -n+1; r < n; r++){                 // loop for all rows of the diamond
        for (c = 0; c < abs(r); c++)            // print blanks "--"
            printf("--");

        num = n;

        for (c = 0; c < 2*(n-abs(r))-1; c++){   // print numbers
            if(c < n-abs(r)-1 )
                printf("%d-", num--);
            else
                printf("%d-", num++);
        }

        printf("\n");                           // new row
    }
}

/*
----------1
-------2  3  4
----5  6  7  8  9
10 11 12 13 14 15 16
---17 18 19 20 21
------22 23 24
---------25
*/
void diamond_of_numbers_v231(int n){
// n - number of rows in upper triangle of diamond

    int r, c, num=1;   // r - row, c - column, num - current number

    for (r = -n+1; r < n; r++){                 // loop for rows
        for (c = 0; c < 3*abs(r); c++)            // print "-"
            printf("-");

        for (c = 0; c < 2*(n-abs(r))-1; c++)    // print current number
            printf("%3d",num++);

        printf("\n\n");                           // new row
    }
}


int main(void)
{
    int n=4;    // n - number of rows of the upper triangle of diamond

    printf("\n 1.1 \t n = %d \n\n", n);
    diamond_of_stars_v11(n);

    printf("\n 1.1.1 \t n = %d \n\n", n);
    hollow_diamond_of_stars_v11(n);

    printf("\n 1.2 \t n = %d \n\n", n);
    diamond_of_stars_v12(n);

    printf("\n 1.2.1 \t n = %d \n\n", n);
    hollow_diamond_of_stars_v12(n);

    printf("\n 2.1.1 \t n = %d \n\n", n);
    diamond_of_numbers_v211(n);

    printf("\n 2.1.2 \t n = %d \n\n", n);
    diamond_of_numbers_v212(n);

    printf("\n 2.2.1 \t n = %d \n\n", n);
    diamond_of_numbers_v221(n);

    printf("\n 2.2.2 \t n = %d \n\n", n);
    diamond_of_numbers_v222(n);

    printf("\n 2.3.1 \t n = %d \n\n", n);
    diamond_of_numbers_v231(n);
    return 0;
}