efrei/programmation-c-cpp/tp3/strcmp.c

/* strcmp */

#include <stdio.h>
#include <stdlib.h>


int strcompare(char*, char*);
void get_alphabetical_order(char*, char*);

int main() {
    char mot[100];
    char *temoin = "CODEUR";
    int i = 0;

    printf("Ecrire un mot en majuscule : ");
    fgets(mot, 100, stdin);
    while (mot[i] != '\n') i++;
    mot[i] = '\0';

    if (strcompare(mot, temoin)) {
        printf("Les mots sont identiques\n");
    } else {
        get_alphabetical_order(mot, temoin);
    }

    return 0;
}

int strcompare(char *mot1, char *mot2) {
    int i = 0, len1 = 0, len2 = 0;

    while (mot1[len1] != '\0') {
        len1++;
    }
    while (mot2[len2] != '\0') {
        len2++;
    }

    if (len1 != len2) {
        return 0;
    }

    while (mot2[i] != '\0') {
        if (mot1[i] != mot2[i]) {
            return 0;
        }
        i++;
    }

    return 1;
}

void get_alphabetical_order(char *mot1, char *mot2) {
    int i = 0;

    while (1) {
        if ((mot1[i] == '\0') && (mot2[i] != '\0')) {
            printf("%s > %s\n", mot1, mot2);
            break;
        }
        if ((mot1[i] != '\0') && (mot2[i] == '\0')) {
            printf("%s > %s\n", mot2, mot1);
            break;
        }
        if (mot1[i] < mot2[i]) {
            printf("%s > %s\n", mot1, mot2);
            break;
        }
        if (mot1[i] > mot2[i]) {
            printf("%s > %s\n", mot2, mot1);
            break;
        }
        if ((mot1[i] == '\0') || (mot2[i] == '\0')) {
            break;
        }
        i++;
    }
}