Interface and Structure
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More Interface Patterns
ed pattern
Examples: bash, bc, text-based adventure games
A main loop with a nested read/interpret/execute/output pattern.
int main(int argc, char *argv[]) {
/* variable declarations */
/* command line argument parsing */
while (/* not stopped */ ) {
/* read and deserialize command string */
/* execute control structure */
/* serialize and write output */
}
}Roguelike Pattern
Similar structure to ed pattern, but the output step involves
redrawing the entire screen instead of printing lines. Programms with
this pattern usually imploy an external library such as
ncurses to handle the
mechanics of painting the screen.
Examples: vim, ASCII-drawn games
int main(int argc, char *argv[]) {
/* variable declarations */
/* command line argument parsing */
/* initialize screen buffers */
while (/* not stopped */ ) {
/* read and deserialize command string */
/* execute control structure */
/* control structure used to update image buffer */
/* repaint screen */
}
}Separate Engine and Interface Pattern
Examples: gitk, games with a GUI
Server structure
int main(int argc, char *argv[]) {
/* variable declarations */
/* command line argument parsing */
/* establish listener */
while (/* not stopped */ ) {
/* wait for client connection */
/* fork (if multi-client environment) */
/* read and deserialize message from client */
/* execute control structure */
/* serialize result and send message to client */
}
}A Simple Makefile
wordfreq: main.o
clang -o wordfreq main.o -lanalytics