2a

#include <stdio.h>

int ultimaCifraSuma(int numar1, int numar2) {
    int suma = numar1 + numar2;
    int ultimaCifra = suma % 10;
    return ultimaCifra;
}

int main() {
    int numar1, numar2, numar3;

    printf("Introduceti primul numar: ");
    scanf("%d", &numar1);

    printf("Introduceti al doilea numar: ");
    scanf("%d", &numar2);

    printf("Introduceti al treilea numar: ");
    scanf("%d", &numar3);

    int suma1_2 = ultimaCifraSuma(numar1, numar2);
    int suma1_2_3 = ultimaCifraSuma(suma1_2, numar3);

    printf("Ultima cifra a sumei celor trei numere este: %d\n", suma1_2_3);

    return 0;
}