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Description: 这里以开始定义的PASCAL语言子集的源程序作为词法分析程序的输入数据。
在词法分析中，自文件头开始扫描源程序字符，一旦发现符合"单词"定义的源程
序字符串时，将它翻译成固定长度的单词内部表示，并查填适当的信息表。经过
词法分析后，源程序字符串（源程序的外部表示）被翻译成具有等长信息的单词
串（源程序的内部表示），并产生两个表格：常数表和标识符表，它们分别包含
了源程序中的所有常数和所有标识符。-Here to begin the definition of a subset of the PASCAL language source program as a lexical analysis of input data. In lexical analysis, since the beginning of the first scan source document characters, once in line with the " word" when the definition of the source string to translate it into fixed-length internal word said, and check the appropriate information sheet to fill. After lexical analysis, the source string (the external source said) has been translated into words, such as long strings of information (the internal source said), and two forms: constant table and the identifier table, which contain, respectively, the source of all the constants and all identifiers.
Platform: |
Size: 2048 |
Author: jiaogd |
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Description: 单片机16*64点阵行扫，可检查屏的好坏-Single Chip 16* 64 dot matrix line scan, check the screen is good or bad
Platform: |
Size: 7168 |
Author: 苗苗 |
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Description: 键盘扫描
矩阵键盘接口（反转法）：
使用双向接口，行列交叉点连键，行列数接近。
行出低，检列码；列出低，检行码；键值等于行列码之和。-Keyboard scan matrix keyboard interface (inversion method): Use two-way interface, the ranks of the intersection with keys, the number of close ranks. Line out is low, check out code listed low, check the line code the key code is equal to the sum of the ranks.
Platform: |
Size: 44032 |
Author: jiangwei |
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Description: 在游戏开始前，按下clear键开始点阵像素的扫描，每次显示一个点，在1.6s的时间内将用到的点阵的16个点扫描一遍以检查好坏；
Re(复位键)重新开始，按下时数码管显示分数清0，重新产生第一个方块；
le键实现左移，ri键实现右移；
由于资源限制，采用一个数码管显示分数，每消一行时，数码管分数加一，加到10时重新自动变为0；
用一个拨码开关控制下落的速度，置1时快速0.6s，置0时慢速1s
-Lattice pixel scanned each time a point before the start of the game, press the clear key 16 points of the lattice to be used in the 1.6s time scan again to check for good or bad Re (reset button) start again, press the digital display scores of clear re-produce the first box le key to achieve the left, ri, key to achieve shifted to the right due to resource constraints, the use of a digital display scores, each eliminate a line, the digital control plus a fraction, automatically re-added to 10 to 0 quickly set using a DIP switch to control the falling speed, 0.6 s 0:00 set slow 1s
Platform: |
Size: 2048 |
Author: wang mingming |
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