From 71eee1204d279fe7590d940a08423e3362609474 Mon Sep 17 00:00:00 2001 From: zlg Date: Thu, 8 Aug 2013 06:35:27 -0500 Subject: Solve Exercise 4-14: Swap Macro Thanks to ##c on Freenode for helping me understand what the text didn't clarify. --- ch4/4-14_swap-macro.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 ch4/4-14_swap-macro.c (limited to 'ch4') diff --git a/ch4/4-14_swap-macro.c b/ch4/4-14_swap-macro.c new file mode 100644 index 0000000..ac2f102 --- /dev/null +++ b/ch4/4-14_swap-macro.c @@ -0,0 +1,30 @@ +#include + +/* The C Programming Language: 2nd Edition + * + * Exercise 4-14: Define a macro swap(t,x,y) that interchanges two arguments + * of type t. (Block structure will help.) + * + * Answer: Macros are read and processed before syntax is, so you can turn + * a macro into shorthand code; more shorthand than functions sometimes. + * + * This macro assumes x and y are of t type. If the types don't match up, + * it'll (probably) break. + */ + +#define swap(t, x, y) {\ + t z;\ + z = x;\ + x = y;\ + y = z;\ +} + +int main() { + int a = 3; + int b = 7; + + printf("a is %d, b is %d\n", a, b); + swap(int, a, b); + printf("Now swap, and... a is %d and b is %d!\n", a, b); + return 0; +} -- cgit v1.2.3-54-g00ecf a6859c690'>refslogtreecommitdiff
path: root/AUTHORS (unfollow)
AgeCommit message (Expand)AuthorFilesLines
2018-11-21Prepare for distributionzlg2-1/+3
2018-10-22vgstash: let backlog filter ignore unbeatable gameszlg1-1/+1
2018-10-18Bump to 0.3beta2 for PyPIzlg1-3/+3
2018-10-18vgstash.DB.__init__: fix error output formattingzlg1-1/+1
2018-10-18README: fix inline <code> formattingzlg1-3/+4
2018-10-18cli: show msg if game to be deleted is not in DBzlg2-2/+12
2018-10-18README: expand on usage, cover shell quotingzlg1-7/+99
2018-10-18cli: Tell the user when a game lacks noteszlg2-3/+15
2018-10-18Catch when an invalid list filter is passedzlg4-3/+24
2018-10-12cli: Add zero-game import/export messageszlg2-11/+18
2018-10-10Bump to 0.3beta1 for PyPIzlg1-1/+1
2018-10-10Move tests and data to dedicated directoryzlg7-10/+26
2018-10-10cli: Add "export" commandzlg2-5/+54
2018-10-10cli: Add "import" commandzlg5-1/+76
2018-10-09Bump to 0.3alpha6 for PyPIzlg1-1/+1
2018-10-09cli: Add "notes" commandzlg2-4/+74
2018-10-09update_game: ensure notes are also savedzlg1-2/+2
2018-10-09cli: add 'update' commandzlg3-20/+92
2018-10-06cli: Add "delete" commandzlg2-0/+19
2018-10-06Remove ID field from DBzlg3-38/+46
2018-10-06cli: change "Status" heading to "Progress"zlg2-36/+40
2018-09-29Bump to 0.3alpha5 for PyPIzlg1-1/+1
2018-09-29cli: Add pretty printing to 'list' commandzlg3-17/+107
2018-09-08setup.py: Bump to alpha4 for PyPIzlg1-1/+1
2018-09-08cli: add '--raw' option to list commandzlg2-9/+45
2018-09-08Add remaining filters to vgstash packagezlg1-2/+11
2018-09-04Update LICENSE to match setup.pyzlg1-80/+67
2018-09-03Branch off from master with pytest, tox, clickzlg16-778/+779
2018-03-18Flesh out filter types and ownership statuszlg3-82/+144
2018-03-18README.mdown: break line correctlyzlg1-1/+1
2018-03-18add 'playlog' list filterzlg2-2/+9
2018-03-13Update helpers a bitzlg1-2/+9
2018-03-13Make VGSTASH_DB_LOCATION point to a filezlg2-21/+20
2016-11-18Remove settings from helpers.shZe Libertine Gamer1-5/+0
2016-11-15Correct phrasing in README.Ze Libertine Gamer1-4/+4
2016-11-13DerpZe Libertine Gamer1-0/+1
2016-11-03Improve error handling in shell scriptsZe Libertine Gamer4-3/+23
2016-10-24Correct run_again, add recursionZe Libertine Gamer1-0/+4
2016-10-21Add quotes to correct behavior for arglistZe Libertine Gamer1-1/+1
2016-10-14updater.sh: add recursion, error handlingZe Libertine Gamer1-43/+101
2016-10-14Correct pipe-handling behaviorZe Libertine Gamer1-1/+9
2016-10-12Clarify a method to move between platformsZe Libertine Gamer1-2/+5