1、画出下列伪代码程序的流程图和盒图： START IF p THEN WHILE q DO f END DO ELSE BLOCK g n END BLOCK END IF STOP

流程图：

st=>start: START
op1=>operation: IF p
cond1=>condition: YES or NO?
op2=>operation: WHILE q DO\nf
sub1=>subroutine: BLOCK\ng\nn
e=>end: STOP

st->op1->cond1
cond1(yes)->op2->cond1
cond1(no)->sub1->e

盒图：

+-------+
| START |
+-------+
    |
    v
+------------------------+
| IF p                   |
|                        |
| +---------------------+|
| | WHILE q DO          ||   YES
| | f                   ||--------->+
| |                     ||         |
| +---------------------+|         |
|                        |         |
| +---------------------+|         |
| | BLOCK               ||         |
| | g                   ||   NO    |
| | n                   ||-------->+
| +---------------------+|         |
|                        |         |
+------------------------+         |
                                   |
                                   v
+-------+
| STOP  |
+-------+