Week 01 Revision Questions

Do I need to set up Rust on my own computer, or can I just use VLAB / CSE?

How could I go about setting up Rust on my own computer?

Let's write our first Rust program, hello world!

First we'll write it as a main.rs file, and use the rustc command to compile it.

Then, we will modify our program to be a cargo project instead.

What are the differences in the two approaches? When should we use each approach in COMP6991?

Translate the following C program into Rust:

#include <stdio.h>

int main(void) {
    int my_integer = 42;

    if (my_integer > 0) {
        printf("%d is positive\n", my_integer);
    } else if (my_integer < 0) {
        printf("%d is negative\n", my_integer);
    } else {
        printf("%d is zero\n", my_integer);
    }

    return 0;
}

Translate the following C program into Rust:

#include <stdio.h>

int main(void) {
    int count = 0;

    while (count < 10) {
        printf("%d\n", count);
        count++;
    }

    return 0;
}

Translate the following C program into Rust:

#include <stdio.h>

int main(void) {
    for (int count = 0; count < 10; count++) {
        printf("%d\n", count);
    }
}

Is it possible to translate this approach directly to Rust? Why / why not?

Translate the following C program into Rust:

#include <stdio.h>

void my_function(int *x);

int main(void) {
    int x = 42;

    my_function(NULL);
    my_function(&x);

    return 0;
}

void my_function(int *x) {
    if (x == NULL) {
        printf("no value for x\n");
    } else {
        printf("x has value %d\n", *x);
    }
}

Is this program possible to write in Rust? Discuss whether this is an advantage or disadvantage of Rust.