在C語言中編寫一個列印右箭頭和左箭頭圖案的程序

程式說明

列印左右箭頭圖案

演算法

接受列印左右箭頭圖案的行數.

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

範例

/*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;
}

輸出

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