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yylval = c - '0'; /* yylval is a global var */ while( isdigit( c=getchar() ) )

yylval = c - '0'; /* yylval is a global var */ while( isdigit( c=getchar() ) ) yylval = 10*yylval + (c - '0'); if (c >= 0) ungetc(c,stdin); return NUMBER;.

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yylval = c - '0'; /* yylval is a global var */ while( isdigit( c=getchar() ) )

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  1. yylval = c - '0'; /* yylval is a global var */ while( isdigit( c=getchar() ) ) yylval = 10*yylval + (c - '0'); if (c >= 0) ungetc(c,stdin); return NUMBER;

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