while AC∧BD ifA1 C=C+l;else while AD A=A+2; 四元式 代码结构图
- (A < C) && (B < D) //条件判断
- L1: //标签
- if (A > 1) //条件判断
- C = C + 1 //C=C+l
- else //否则
- L2: //标签
- if (A < D) //条件判断
-
A = A + 2 //A=A+2 -
goto L2 //跳转到标签L2 - goto L1 //跳转到标签L1
代码结构图： +----------------+ | A < C | | B < D | +----------------+ | | +---------------+ | A > 1 | +---------------+ | | +---------------+ | C = C + 1 | +---------------+ | | +---------------+ | goto L1 | +---------------+ | | +---------------+ | A < D | +---------------+ | | +---------------+ | A = A + 2 | +---------------+ | | +---------------+ | goto L2 | +---------------+ | | +---------------+ | L1: | +---------------
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