Challenge 1: A Greeting Program With Two printf Calls — Possible Solution
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#include <stdio.h>

int main() {
    printf("My name is Alex.\n");
    printf("Welcome to my first C program!\n");
    return 0;
}

Compile with an explicit output name, then run it:

    $ gcc greeting.c -o greeting
    $ ./greeting
    My name is Alex.
    Welcome to my first C program!

WHY THIS WORKS AS AN ANSWER
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Two separate printf calls, each ending with its own "\n" (C doesn't add
a trailing newline automatically the way println! does in Rust), and
the compile step names the output explicitly with -o rather than
relying on the default a.out name.