generate random text and convert it to uppercase

main.cpp

#include <stdio.h>
#include <pthread.h>
#include <semaphore.h>
#include <math.h>
#include <ctype.h>

int number = 10, buff = 0;
char queue[10][10];
sem_t full_sem, empty_sem;

void insert(char e[]) {
    if (buff + 1 < number) {
        buff++;
        printf(", inserted text: %s", e);
        for (int i = 0; i < number; ++i) {
            queue[buff][i] = e[i];
        }
        } else{
        printf("\nfull");}
}


void *produce() {
    for (int i = 0; i < number; ++i) {
        sem_wait(&full_sem);
        printf("\ninsert random text #%d", i);
        char tmpChar[100];
        for (int j = 0; j < number; ++j) {
            tmpChar[j] = (char) 'a' + (random() % 26);
        }
        insert(tmpChar);
        sem_post(&empty_sem);
    }


}

void *consume(void *a) {

    for (int i = 0; i < number; ++i) {
        char v[10];
        sem_wait(&empty_sem);

        if (buff > 0) {
            for (int j = 0; j < number; ++j) {
                v[j] = toupper(queue[buff][j]);
            }
            buff--;
        } else {
            printf("\nempty");
        }

        printf("\nuppercase char: %s", v);
        sem_post(&full_sem);
    }


}

int main() {
    pthread_t t[2];
    sem_init(&full_sem, 0, number - 1);
    sem_init(&empty_sem, 0, 0);

    pthread_create(&t[0], NULL, &produce, NULL);
    pthread_create(&t[1], NULL, &consume, NULL);

    pthread_join(t[0], NULL);
    pthread_join(t[1], NULL);

    sem_destroy(&full_sem);
    sem_destroy(&empty_sem);
    return 0;
}

|SampleOutput.txt

insert random text #0, inserted text: nwlrbbmqbh
insert random text #1, inserted text: cdarzowkky
insert random text #2, inserted text: hiddqscdxr
insert random text #3, inserted text: jmowfrxsjy
insert random text #4, inserted text: bldbefsarc
insert random text #5, inserted text: bynecdyggx
insert random text #6, inserted text: xpklorelln
insert random text #7, inserted text: mpapqfwkho
insert random text #8, inserted text: pkmcoqhnwn
uppercase char: PKMCOQHNWN
uppercase char: MPAPQFWKHO
uppercase char: XPKLORELLN
uppercase char: BYNECDYGGX
uppercase char: BLDBEFSARC
uppercase char: JMOWFRXSJY
uppercase char: HIDDQSCDXR
uppercase char: CDARZOWKKY
uppercase char: NWLRBBMQBH
insert random text #9, inserted text: kuewhsqmgb
uppercase char: KUEWHSQMGB