Convert the substring abc to ABC lex program

The program will read a line of text and changes all occurrence of the substring "abc" with "ABC"

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%option noyywrap

%%

abc    { printf("ABC"); }

.|\n   { printf("%s", yytext); }

%%

int main() {

    yylex();

    return 0;

}

Execution

$flex abc.lex

$ gcc lex.yy.c

$ ./a.out

this is a testabc djd abc djd

this is a testABC djd ABC djd

djdjd ajdjd abc djdabc abdf abcj abdc abc

djdjd ajdjd ABC djdABC abdf ABCj abdc ABC