Concepts Of Programming Languages
Concepts Of Programming Languages
12th Edition
ISBN: 9780134997186
Author: Sebesta, Robert W.
Publisher: Pearson,
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Chapter 1, Problem 10RQ

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Orthogonality:

Orthogonality means the primitive constructs of a programming language can be combined in all possible ways without any exceptions.

Orthogonality makes programming languages easier to learn and lack of orthogonality in the programming languages will lead to exceptions, which will make the programming language difficult to learn...

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How to develop a C program that receives the message sent by the provided program and displays the name and email included in the message on the screen?Here is the code of the program that sends the message for reference: typedef struct {    long tipo;    struct {        char nome[50];        char email[40];    } dados;} MsgStruct; int main() {    int msg_id, status;    msg_id = msgget(1000, 0600 | IPC_CREAT);    exit_on_error(msg_id, "Creation/Connection");    MsgStruct msg;    msg.tipo = 5;    strcpy(msg.dados.nome, "Pedro Silva");    strcpy(msg.dados.email, "pedro@sapo.pt");    status = msgsnd(msg_id, &msg, sizeof(msg.dados), 0);    exit_on_error(status, "Send");    printf("Message sent!\n");}
9. Let L₁=L(ab*aa), L₂=L(a*bba*). Find a regular expression for (L₁ UL2)*L2. 10. Show that the language is not regular. L= {a":n≥1} 11. Show a derivation tree for the string aabbbb with the grammar S→ABλ, A→aB, B→Sb. Give a verbal description of the language generated by this grammar.
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Concepts Of Programming Languages

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