[SPCA] Fixes a few errors

semester3/spca/parts/01_c/01_basics/03_operators.tex

@@ -37,7 +37,7 @@ Very low precedence belongs to boolean operators \verb|&&| and \texttt{||}, as w
 \shade{blue}{Associativity} 
 \begin{itemize}
     \item Left-to-right: $A + B + C \mapsto (A + B) + C$
-    \item Right-to-left: \texttt{A += B += C} $\mapsto$ \texttt{(A += B) += C}
+    \item Right-to-left: \texttt{A += B += C} $\mapsto$ \texttt{A += (B += C)}
 \end{itemize}
 
 As it should be, boolean and, as well as boolean or, support early termination.

semester3/spca/parts/01_c/01_basics/06_integers.tex

@@ -1,4 +1,5 @@
 \subsubsection{Integers in C}
+\label{sec:c-integers}
 As a reminder, integers are encoded as follows in big endian notation, with $x_i$ being the $i$-th bit and $w$ being the number of bits used to represent the number:
 \begin{itemize}[noitemsep]
     \item \bi{Unsigned}: $\displaystyle \sum_{i = 0}^{w - 1} x_i \cdot 2^i$