calc test

.gitignore

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+*.exe

analyzers/calc.l

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+%{
+#include "calc.tab.h"  // Автоматически создаётся Bison
+%}
+
+%%
+[0-9]+      { yylval = atoi(yytext); return NUMBER; }
+[-+*/()]    { return yytext[0]; }
+[ \t\n]     ;  // Игнорируем пробелы и переносы
+.           { printf("unknown: %s\n", yytext); }
+%%
+
+int yywrap() { return 1; }

analyzers/calc.y

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+%{
+#include <stdio.h>
+#include <stdlib.h>
+void yyerror(const char *s);
+int yylex();
+%}
+
+%token NUMBER
+%left '+' '-'
+%left '*' '/'
+
+%%
+input:    /* пусто */
+      | input expr { printf("= %d\n", $2); }
+      ;
+
+expr:    NUMBER          { $$ = $1; }
+      | expr '+' expr   { $$ = $1 + $3; }
+      | expr '-' expr   { $$ = $1 - $3; }
+      | expr '*' expr   { $$ = $1 * $3; }
+      | expr '/' expr   { $$ = $1 / $3; }
+      | '(' expr ')'    { $$ = $2; }
+      ;
+%%
+
+void yyerror(const char *s) {
+    fprintf(stderr, "ERROR: %s\n", s);
+}
+
+int main() {
+    yyparse();
+    return 0;
+}

main.py

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+import os
+import subprocess
+
+def main():
+
+    # Подготовка констант
+    FLEX_EXE_PATH = r"C:\tools\win_flex_bison\win_flex.exe"
+    BISON_EXE_PATH = r"C:\tools\win_flex_bison\win_bison.exe"
+    ANALYZER_NAME = f'calc' # basename .l, .y файлов
+    LEXICAL_ANALYZER_PATH = fr"analyzers\{ANALYZER_NAME}.l"
+    SYNTAXIC_ANALYZER_PATH = fr"analyzers\{ANALYZER_NAME}.y"
+    #
+
+    # Подготовка списка команд
+    cmds = [f'{FLEX_EXE_PATH} {LEXICAL_ANALYZER_PATH}',
+            f'{BISON_EXE_PATH} -d {SYNTAXIC_ANALYZER_PATH}',
+            f'gcc lex.yy.c {ANALYZER_NAME}.tab.c -o {ANALYZER_NAME}.exe']
+    #
+
+    # Исполнение команд
+    for cmd in cmds:
+        try:
+            subprocess.run(cmd, capture_output=True, check=True)
+            print(f'\033[92mSuccess execute {cmd}!\033[0m')
+        except subprocess.CalledProcessError as e:
+            print(f"\033[91mError during export: {e}\033[0m")
+    #
+
+    # Очистка
+    for path in ['lex.yy.c', 
+                 f'{ANALYZER_NAME}.tab.c', 
+                 f'{ANALYZER_NAME}.tab.h']:
+        os.remove(path)
+    #
+
+if __name__ == "__main__":
+    main()