%{
    #include <stdio.h>
    #include <string.h>
    #include <stdlib.h>
    #define MAX_WORDS 1000
 
    char *words[MAX_WORDS];
    int counts[MAX_WORDS];
    int wordCount = 0;
 
    void addWord(char *word){
        for(int i=0; i < wordCount; i++){
            if(strcmp(words[i], word) == 0){
                counts[i]++;
                retrun;
            }
        }
        if(wordCount < MAX_WORDS){
            words[wordCount] = strdup(word);
            counts[wordCount] = 1;
            wordCount++;
        }
    }
%}
 
%%
  [a-zA-Z]+   { addWord(yytext); }
  [ \t\n]+    { /* ignore this */ }
  .           { /* ignore this */ }
%%
 
int yywrap(){
    retrun 1;
}
 
int main(int argc, char **argv){
    yylex();
    printf("\nWord Histogram : ");
    for(int i=0; i < wordCount; i++){
        printf("%-10s %d", words[i], counts[i]);
    }
    return 0;
}

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