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Implement a star array with a specified number of rows

WBOY
Release： 2016-07-25 08:47:20
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Loop output algorithm exercise
  1. if(!empty($_GET['row'])){
  2. $row=$_GET['row'];
  3. }else {
  4. $row=10;
  5. }
  6. echo '

    Direct left triangle

    ';
  7. for($i=0;$i<$row;$i++){
  8. for($j=0;$j<=$i;$ j++){
  9. echo '*';
  10. }
  11. echo '
    ';
  12. }
  13. echo '

    right right triangle

    ';
  14. for($i=0;$i< ;$row;$i++){
  15. for($j=$row-1;$j>$i;$j--){
  16. echo ' ';
  17. }
  18. for($j=0;$j< =$i;$j++){
  19. echo '*';
  20. }
  21. echo '
    ';
  22. }
  23. echo '

    Parallelogram

    ';
  24. for($i=0 ;$i<$row;$i++){
  25. for($j=$row-1;$j>$i;$j--){
  26. echo ' ';
  27. }
  28. for($j=0; $j<=$row;$j++){
  29. echo '*';
  30. }
  31. echo '
    ';
  32. }
  33. echo '

    Isosceles Triangle

    ';
  34. for( $i=1;$i<$row+1;$i++){
  35. for($j=$row;$j>$i;$j--){
  36. echo ' ';
  37. }
  38. for($ j=1;$j<=2*$i-1;$j++){
  39. echo '*';
  40. }
  41. echo '
    ';
  43. }
  44. echo '

    Inverted Isosceles Triangle

    ';
  45. for($i=$row;$i>0;$i--){
  46. for($j=0;$j<=$row-$i-1;$j++) {
  47. echo ' ';
  48. }
  49. for($j=1;$j<=2*$i-1;$j++){
  50. echo '*';
  51. }
  52. echo '
    ';
  54. }
  55. echo '

    Rhombus

    ';
  56. function rhomb($row){
  57. for($i=1;$i<$row+1;$i++){
  59. for($ j=$row;$j>$i;$j--){
  60. echo ' ';
  61. }
  62. for($j=1;$j<=2*$i-1;$j++){
  64. echo '*';
  65. }
  66. echo '
    ';
  67. }
  68. for($i=$row;$i>0;$i--){
  69. for($j=0;$j<= $row-$i-1;$j++){
  70. echo ' ';
  71. }
  72. for($j=1;$j<=2*$i-1;$j++){
  73. echo '*';
  74. }
  75. echo '
    ';
  77. }
  78. }
  79. rhomb($row/2);
  80. ?>
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Implement a star array with a specified number of rows


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实现指定行数的星阵
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