In this assignment, you are provided with working code that does the following: 1. You input a sentence (containing no more than 50 characters). 2. The program will read the sentence and put it into an array of characters. 3. Then, it creates one thread for each character in the sentence. 4. The goal of the program is to capitalize each letter that has an odd index. The given program actually does this, but lacks the synchronization of the threads, so the output is not correct. You will need to provide the synchronization using mutex locks. Specifically, you are to (1) declare the mutex lock, (2) initialize the mutex lock, (3) lock and unlock the mutex lock at an appropriate location that results in the code working as expected, and (4) destroy the mutex lock. Be sure to place the mutex locks so that your program works correctly every time. Do not remove code or functions – you are to add the synchronization pieces only. When compiling using the GNU C compiler, be sure to include the –lpthread flag option. .c file down below PLEASE DO THIS IN C PROGRAMMING #include #include #include #define SIZE 50 char sentence[2000]; int ind = 0; char convertUppercase(char lower) { //Converts lowercase un uppercase if ((lower >96) && (lower <123)) { return (lower -32); } else { return lower; } } void printChar() { //prints the converted sentence printf("The new sentence is [%d]: \t%c\n", ind, sentence[ind]); ind++; } void *convertMessage(void *ptr) { // Function that each threads initiates its execution if (ind %2) { sentence[ind] = convertUppercase(sentence[ind]); } printChar(); return0; } int main() { int i; char buffer[SIZE]; char*p; pthread_t ts[SIZE]; // define up to 50 threads printf("Please enter a phrase (less than 50 characters): "); if (fgets(buffer, sizeof(buffer), stdin) !=NULL) { if ((p =strchr(buffer, '\n')) !=NULL) { *p ='\0'; } } strcpy(sentence, buffer); // copy string to char array printf("The original sentence is: \t%s\n", sentence); // create one thread for each character on the input word for (i =0; i

In this assignment, you are provided with working code that does the following: 1. You input a sentence (containing no more than 50 characters). 2. The program will read the sentence and put it into an array of characters. 3. Then, it creates one thread for each character in the sentence. 4. The goal of the program is to capitalize each letter that has an odd index. The given program actually does this, but lacks the synchronization of the threads, so the output is not correct. You will need to provide the synchronization using mutex locks. Specifically, you are to (1) declare the mutex lock, (2) initialize the mutex lock, (3) lock and unlock the mutex lock at an appropriate location that results in the code working as expected, and (4) destroy the mutex lock. Be sure to place the mutex locks so that your program works correctly every time. Do not remove code or functions – you are to add the synchronization pieces only. When compiling using the GNU C compiler, be sure to include the –lpthread flag option. .c file down below PLEASE DO THIS IN C PROGRAMMING #include #include #include #define SIZE 50 char sentence[2000]; int ind = 0; char convertUppercase(char lower) { //Converts lowercase un uppercase if ((lower >96) && (lower <123)) { return (lower -32); } else { return lower; } } void printChar() { //prints the converted sentence printf("The new sentence is [%d]: \t%c\n", ind, sentence[ind]); ind++; } void convertMessage(void ptr) { // Function that each threads initiates its execution if (ind %2) { sentence[ind] = convertUppercase(sentence[ind]); } printChar(); return0; } int main() { int i; char buffer[SIZE]; charp; pthread_t ts[SIZE]; // define up to 50 threads printf("Please enter a phrase (less than 50 characters): "); if (fgets(buffer, sizeof(buffer), stdin) !=NULL) { if ((p =strchr(buffer, '\n')) !=NULL) { p ='\0'; } } strcpy(sentence, buffer); // copy string to char array printf("The original sentence is: \t%s\n", sentence); // create one thread for each character on the input word for (i =0; i

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Related questions

Question

.c file down below PLEASE DO THIS IN C PROGRAMMING

#include <stdio.h>

#include <string.h>

#include <pthread.h>

#define SIZE 50

char sentence[2000];

int ind = 0;

char convertUppercase(char lower)

{

//Converts lowercase un uppercase

if ((lower >96) && (lower <123))

{

return (lower -32);

}

else

{

return lower;

}

void printChar()

{

//prints the converted sentence

printf("The new sentence is [%d]: \t%c\n", ind, sentence[ind]);

ind++;

}

void *convertMessage(void *ptr)

{

// Function that each threads initiates its execution

if (ind %2)

{

sentence[ind] = convertUppercase(sentence[ind]);

}

printChar();

return0;

}

int main()

{

int i;

char buffer[SIZE];

char*p;

pthread_t ts[SIZE]; // define up to 50 threads

printf("Please enter a phrase (less than 50 characters): ");

if (fgets(buffer, sizeof(buffer), stdin) !=NULL)

{

if ((p =strchr(buffer, '\n')) !=NULL)

{

*p ='\0';

}

strcpy(sentence, buffer); // copy string to char array

printf("The original sentence is: \t%s\n", sentence);

// create one thread for each character on the input word

for (i =0; i <strlen(buffer) +1; ++i)

{

pthread_create(&ts[i], NULL, convertMessage, NULL);

}

// we wait until all threads finish execution

for (i =0; i <strlen(buffer); i++)

{

pthread_join(ts[i], NULL);

}

printf("\n");

return0;

}

The problem is that the output should look something like:
$ . /a.out
Please enter a phrase (less than 50 characters): when all else
fails, read the instructions
The original sentence is: when all else fails, read the instructions
The new sentence is [0]:
The new sentence is [1]:
The new sentence is [2]:
The new sentence is [3]:
The new sentence is [4]:
The new sentence is [5]:
The new sentence is [6]:
The new sentence is [7]:
The new sentence is [8]:
The new sentence is [9]:
The new sentence is [10]: 1
The new sentence is [11]: S
The new sentence is [12]: e
The new sentence is [13]:
The new sentence is [14]: f
The new sentence is [15]: A
The new sentence is [16]: i
The new sentence is [17]: L
H
e
N
A
1

The new sentence is [18] :
The new sentence is [19]:
The new sentence is [20]:
The new sentence is [21]:
The new sentence is [22]:
The new sentence is [23]:
The new sentence is [24]:
The new sentence is [25]:
The new sentence is [26]:
The new sentence is [27]:
The new sentence is [28]:
The new sentence is [29]:
The new sentence is [30]:
The new sentence is [31]:
The new sentence is [32]:
The new sentence is [33]:
The new sentence is [34]:
The new sentence is [35]:
The new sentence is [36]:
The new sentence is [37]:
The new sentence is [38]:
The new sentence is [39]:
The new sentence is [40] :
The new sentence is [41]:
The new sentence is [42]:
R
e
A
d
H
i
N
T
T
n
S

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