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1. What is the grammar accepted by this interpreter, write as EBNF form. 2. How can the bison program evaluate the input, print out the

1. What is the grammar accepted by this interpreter, write as EBNF form.
2. How can the bison program evaluate the input, print out the result image text in transcribed
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calc1.1 /* calculator #1 */ %1 #include "y.tab.h" #include void yyerror(char*); [0-91+ yylval = atoi(yytext); return INTEGER; f return *yytext; I-+In] I It] /* skip whitespace / yyerror("Unknown character"); int yywrap (void) [ return 1

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