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Commit f7424e4

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author
hengxin
committed
1-3-tromino-tiling: +overview, revision of 1d-array and 2d-array, +handout versoin
1 parent 3ad99a0 commit f7424e4

12 files changed

+80
-33
lines changed
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‎tutorial/1-3-tromino-tiling/1-3-tromino-tiling.tex‎

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@@ -7,9 +7,9 @@
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\subtitle{--- \subtitletext}
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\author[Hengfeng Wei]{\large 魏恒峰}
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\titlegraphic{\includegraphics[height = 2.0cm]{figs/qrcode-programming-tutorial.png}}
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%\titlegraphic{\includegraphics[height = 2.0cm]{figs/qrcode-programming-tutorial.png}}
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\institute{hfwei@nju.edu.cn}
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\date{2017年10月27日}
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\date{2017年11月03日}
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\AtBeginSection[]{
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\begin{frame}[noframenumbering, plain]
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\maketitle
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\input{parts/1-2-review}
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\input{parts/overview}
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% \input{parts/1-2-review}
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\input{parts/memory}
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% \input{parts/recursion}
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% pointer-1d-array.tex, pointer-2d-array.tex
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‎tutorial/1-3-tromino-tiling/parts/memory.tex‎

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\begin{frame}{}
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\begin{definition}[Memory (K\&R)]
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The memory is organized as a collection of consecutively \red{addressed} cells
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that may be manipulated individually or in contiguous groups.
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that may be manipulated \blue{individually or in contiguous groups}.
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\end{definition}
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\fignocaption{width = 0.60\textwidth}{figs/memory-cell}
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%%%%%%%%%%%%%%%
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\begin{frame}{}
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\fignocaption{width = 0.60\textwidth}{figs/program-memory-cplusplus}
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\vspace{-0.60cm}
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\centerline{Program Memory}
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\end{frame}
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%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%
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\begin{frame}{}
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\begin{frame}[fragile]{}
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\begin{table}
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\begin{tabular}{c|c|c}
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\centering
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\begin{adjustbox}{max width = \textwidth}
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\begin{tabular}{c|c|c|c}
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\hline
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Types & Scopes &Lifttimes \\ \hline
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Static/Global & The entire file & The lifetime of the program \\ \hline
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Automatic & & \\ \hline
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Dynamic & & \\ \hline
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{\bf Type} & {\bf Scope} & {\bf Lifttime} & {\bf Storage} \\ \hline \hline
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\blue{\it Global} & The entire file & The lifetime of the \blue{program} & .BSS/.DATA \\ \hline
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\blue{\it Static} & The \red{function} it is declared within & The lifetime of the \blue{program} & .BSS/.DATA \\ \hline
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\blue{\it Automatic} & The \red{function} it is declared within & While the \blue{function} is executing & Stack \\ \hline
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\blue{\it Dynamic} & \innercell{c}{Determined by the \red{pointers} \\ that reference this memory} & Until the memory is \blue{freed} & Heap \\ \hline
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\end{tabular}
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\end{adjustbox}
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\end{table}
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\begin{lstlisting}[style = Cstyle]
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int a = 1; // global (inited)
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int b; // global (uninited)
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int f(void) {
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int c = 0; // automatic (local)
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static int d = 0; // static (inited)
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d++;
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int *p = malloc( sizeof(int) ); // dynamic
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free(p);
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}
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\end{lstlisting}
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\end{frame}
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%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%
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\begin{frame}[fragile]{}
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\begin{lstlisting}[style = Cstyle]
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int (*pa)[n] = malloc( sizeof(int[m][n]) );
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\end{lstlisting}
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\pause
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\fignocaption{width = 0.25\textwidth}{figs/tiling-8-8}
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\end{frame}
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%%%%%%%%%%%%%%%
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‎tutorial/1-3-tromino-tiling/parts/pointer-1d-array.tex‎

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\]
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\end{definition}
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\vspace{0.40cm}
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\pause
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\centerline{\teal{\texttt{array-1d.c}}}
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\vspace{0.40cm}
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\begin{lstlisting}[style = Cstyle]
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int a[5];
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a, $\quad$ &a[0] // what are they?
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&a // what is this?
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\end{lstlisting}
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\vspace{0.40cm}
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\pause
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\centerline{\teal{\texttt{array-1d.c}}}
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\end{frame}
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%%%%%%%%%%%%%%%
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\begin{lstlisting}[style = Cstyle]
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int a[5];
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int *pa;
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int *pa = a;
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\end{lstlisting}
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\begin{definition}[Equivalence between Accesses]
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void f(int a[], int n);
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void f(int *a, int n);
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f(a, 5);
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f(pa, 5);
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f(a, 5); // int a[5] = {0};
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f(pa, 5); // int *pa = a;
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\end{lstlisting}
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\begin{lstlisting}[style = Cstyle]
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int a[n];
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f(a, n);
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int *pa = malloc( sizeof(int[n]) );
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f(pa, n);
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\end{lstlisting}
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\end{frame}
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%%%%%%%%%%%%%%%

‎tutorial/1-3-tromino-tiling/parts/pointer-2d-array.tex‎

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\vspace{0.50cm}
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\pause
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\begin{lstlisting}[style = Cstyle]
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a[i][j]
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a[i][j] // *((*(a + i)) + j)
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\end{lstlisting}
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\end{frame}
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%%%%%%%%%%%%%%%
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\begin{frame}[fragile]{}
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\begin{lstlisting}[style = Cstyle]
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void f(int a[3][5]);
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void f(int a[][5], int m); // m rows
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void f(int (*a)[5], int m);
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f(a, 3);
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f(pa, 3);
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f(a, 3); // int a[3][5];
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f(pa, 3); // int (*pa)[5] = a;
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\end{lstlisting}
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\end{frame}
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%%%%%%%%%%%%%%%
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\pause
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%%%%%%%%%%%%%%%
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\begin{frame}[fragile]{}
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\begin{lstlisting}[style = Cstyle]
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void f(int m, int n, int a[m][n]);
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void f(int m, int n, int a[][n]);
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void f(int m, int n, int (*a)[n]);
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f(3, 5, a);
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f(3, 5, pa);
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int a[m][n];
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f(m, n, a);
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int (*pa)[n] = malloc( sizeof(int[m][n]) );
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f(m, n, pa);
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\end{lstlisting}
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\end{frame}
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%%%%%%%%%%%%%%%

‎tutorial/1-3-tromino-tiling/parts/pointers-arrays.tex‎

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\vspace{0.80cm}
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\begin{quote}
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In C, there is a strong relationship between pointers and arrays,
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In C, there is a \red{strong relationship between pointers and arrays},
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strong enough that pointers and arrays should be discussed simultaneously.
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\hfill --- K\&R

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