CONTADOR DE PALABRAS, C (gcc)

CONTADOR DE PALABRAS

typedef struct word{
    char word[41];
    int quantity;
} word;

bool isaword (char *sentence){
    int i=0;
    
    for(i=0; sentence[i]!='\0';i++){
        if(isalpha(sentence[i])){
        }
        else{
            return false ;
        }
    }
    return true;
}

void lowercase (char *sentence){
    int i=0;
    
    for(i=0; sentence[i]!='\0';i++){
        sentence[i]=tolower(sentence[i]);
    }
}
// INICIO FUNCION PARA OCUPAR QSORT
int compareQSORT (const void *A, const void *B){
    word *ptrA =(word*) A;
    word *ptrB =(word*) B;
    return strcmp((ptrB->word),(ptrA->word));
}
// FIN FUNCION PARA OCUPAR QSORT
int comparewords(char *sentence, int quan,word *vectorword ){
    
    for(int i=0;i<quan;i++){
        if(strcmp(sentence,vectorword[i].word)==0){
            return i;
        }
    }
    return -1;
}
void mostrarPalabrasFrecuencia(FILE *entrada,FILE **salida){
    
    word *vectorword=NULL;
    char sentence[100];
    int n=0;
    int cant=0;
    while((fscanf(entrada,"%s",sentence))!=EOF){
        if(isaword(sentence)==true){
            lowercase(sentence);
            if((cant>=1)&&comparewords(sentence,cant,vectorword)!=-1){
                vectorword[comparewords(sentence,cant,vectorword)].quantity++;
            }
            else{
                vectorword=realloc(vectorword,sizeof(word)*(n+1));
                int i;
                for(i=0;sentence[i]!='\0';i++){
                    vectorword[n].word[i]=sentence[i];
                }
                vectorword[n].word[i]='\0';
                vectorword[n].quantity=1;
                cant++;
                n++;
            }
        }
    }
qsort(vectorword,cant,sizeof(word),compareQSORT);
    for(int i=cant-1;i>=0;i--){
        fprintf(*salida,"%s %d\n",vectorword[i].word,vectorword[i].quantity);
    }
}


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