Patterns in C language

Problem 1_________________________

*******

*******

*******

*******

*******

*******

*******

Source Code:-

#include<stdio.h>

void main()

{

       int r,c;

       for (r=1;r<=7;r++)

       {

              for (c=1;c<=7;c++)

                     printf("*");

              printf("\n");

       }

}

Problem 2_________________________

*

**

***

****

*****

******

*******

Source Code:-

#include<stdio.h>

void main()

{

       int r,c;

       for (r=1;r<=7;r++)

       {

              for (c=1;c<=r;c++)

                     printf("*");

              printf("\n");

       }

}

Problem 3_________________________

*******

******

*****

****

***

**

*

Source Code:-

#include<stdio.h>

void main()

{

       int r,c;

       for (r=1;r<=8;r++)

       {

              for (c=9;c>r;c--)

                     {

                           printf("*");

                     }

              printf("\n");

       }

}

Problem 4_________________________

********

*           *

*           *

*           *

*           *

*           *

*           *

********

Source Code:-

#include<stdio.h>

void main()

{

       int r,c;

       for (r=1;r<=8;r++)

       {

              for (c=1;c<=8;c++)

              {

                     if (r==8 || r==1)

                     printf("*");

                     else if (c==1 || c==8)

                     (printf("*"));

                     else

                     (printf(" "));

              }

              printf("\n");

       }

}

Problem 5_________________________

********

 ********

********

 ********

********

 ********

********

 ********

Source Code:-

#include<stdio.h>

void main()

{

       int r,c,n,d;

       for (r=1;r<=8;r++)

       {

              for(c=1;c<=9;c++)

              {

                     n=r%2;

                     d=c%2;

                     if (c==9 && n!=0)

                           printf(" ");

                     else if (c==1 && n==0)

                           printf(" ");

                     else

                           printf("*");

              }

              printf("\n");

       }

}

Problem 6_________________________

        

        *

       **

      ***

     ****

    *****

   ******

  *******

*********

Source Code:-

#include<stdio.h>

void main()

{

       int r,c;

       for (r=1;r<=5;r++)

       {

              for (c=1;c<=(r+4);c++)

                     {

                           if(c<=(5-r))

                                  printf(" ");

                           else

                     printf("*");

                     }

              printf("\n");

       }

}