Analisi Del Testo

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_STR_LEN 256
#define MAX_WORDS 64

FILE * my_fopen(char *);
void process_file(FILE *, int [2], char [2][MAX_STR_LEN]);
void process_string(char [MAX_STR_LEN], char [2][MAX_STR_LEN]);

int main ()
{
    int pos[2];
    char words[2][MAX_STR_LEN];
    FILE * fp;
    fp = my_fopen("r");
    process_file(fp, pos, words);
    fclose(fp);
    printf("Longest word (%s) is at line %d\nShortest word (%s) is at line %d\n", words[0], pos[0]+1, words[1], pos[1]+1);
    return 0;
}

FILE * my_fopen(char * mode)
{
    char nome_file[MAX_STR_LEN];
    FILE * fp;
    printf("Insert file name: ");
    scanf("%s", nome_file);
    if((fp = fopen(nome_file, mode)) == NULL) {
        printf("Unable to open file %s.\n", nome_file);
        exit(EXIT_FAILURE);
    }
    return fp;
}

void process_file(FILE * fp, int pos[2], char words[2][MAX_STR_LEN]){
    char str[MAX_STR_LEN], cur_words[2][MAX_STR_LEN];
    int str_num=0;
    while(feof(fp)==0){
        fgets(str, MAX_STR_LEN-1, fp);
        process_string(str, cur_words);
        if((strlen(cur_words[0])>strlen(words[0]))||(str_num==0)){
            pos[0]=str_num;
            strcpy(words[0], cur_words[0]);
        }
        if((strlen(cur_words[1])<strlen(words[1]))||(str_num==0)){
            pos[1]=str_num;
            strcpy(words[1], cur_words[1]);
        }
        str_num++;
    }
}

void process_string(char string[MAX_STR_LEN], char words[2][MAX_STR_LEN]){
    int num_words=0, i;
    char * token;
    char del[]=" ,-_!?'“”:.()’;", cur_words[MAX_WORDS][MAX_STR_LEN];
    token=strtok(string, del);
    while(token!=NULL){
        if(strlen(token)>1)
            strcpy(cur_words[num_words++], token);
        token=strtok(NULL, del);
    }
    for(i=0;i<num_words;i++){
        if((strlen(cur_words[i])>strlen(words[0]))||(i==0))
            strcpy(words[0], cur_words[i]);
        if((strlen(cur_words[i])<strlen(words[1]))||(i==0))
            strcpy(words[1], cur_words[i]);
    }
}