Write a program in C language that prints right arrow and left arrow patterns

Program description

Print left and right arrow patterns

Algorithm

Accepts the number of lines for printing left and right arrow patterns.

Print Upper Part of the Arrow with Stars Patterns
Print Inverted Right Triangle with Stars Patterns
Print Bottom Part of the Arrow with Stars Patterns
Print the Right Triangle with Stars Patterns

Example

/*Program to print the Left and right arrow pattern*/
#include<stdio.h>
int main() {
   int r, c, rows; //Left Arrow Pattern
   int r1, c1, rows1; //Right Arrow Pattern
   clrscr();
   printf("Enter number of rows to print the Left Arrow Pattern: ");
   scanf("%d", &rows);
   printf("</p><p>");
   printf("The Left Arrow Pattern is:");
   printf("</p><p>");
   for(r=1; r<rows; r++){
      for(c=1; c<=(rows-r); c++){
         printf(" ");
      }
      for(c=r;c<=rows; c++){
         printf("*");
      }
      printf("</p><p>");
   }
   for(r=1; r<=rows; r++){
      for(c=1; c<r; c++){
         printf(" ");
      }
      for(c=1; c<=r; c++){
         printf("*");
      }
      printf("</p><p>");
   }
   printf("Enter number of rows to print the Right Arrow Pattern: ");
   scanf("%d", &rows1);
   printf("</p><p>");
   printf("The Right Arrow Pattern is:");
   printf("</p><p>");
   for(r1=1; r1<rows1; r1++){
      for(c1=1; c1<=(2*r1-2); c1++){
         printf(" ");
      }
      for(c1=r1; c1<=rows1; c1++){
         printf("*");
      }
      printf("</p><p>");
   }
   for(r1=1; r1<=rows1; r1++){
      for(c1=1; c1<=(2*rows1 - 2*r1); c1++){
         printf(" ");
      }
      for(c1=1; c1<=r1; c1++){
         printf("*");
      }
      printf("</p><p>");
   }
   getch();
   return 0;
}

Output

The above is the detailed content of Write a program in C language that prints right arrow and left arrow patterns. For more information, please follow other related articles on the PHP Chinese website!