Dump some files from personal directory

7 files changed, 236 insertions, 0 deletions

diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
new file mode 100644
index 0000000..f6f2d94
--- /dev/null
+++ b/.vscode/c_cpp_properties.json
@@ -0,0 +1,16 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [],
+            "cStandard": "c17",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "linux-clang-x64",
+            "compilerPath": "/usr/bin/gcc"
+        }
+    ],
+    "version": 4
+}
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..5e6c997
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,12 @@
+CC_D = gcc -Wall -Wextra -pedantic -g -O0
+CC_R = gcc -Wall -Wextra -pedantic -g -O2
+CC ?= CC_D
+
+OBJ =
+
+all:
+	echo "Make what, mate? (no default target)" >&2
+	exit 2
+
+clean:
+	rm -f $(OBJ)
diff --git a/qna/gggg123.c b/qna/gggg123.c
new file mode 100644
index 0000000..b776e4e
--- /dev/null
+++ b/qna/gggg123.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+
+int main()
+
+{
+	int x, y, z; //정수 변수 정의
+	scanf("%d %d %d", &x, &y, &z); //x, y, z 입력
+	int xh, yh, zh; //각 변수의 백의 자리수에 대한 변수 정의
+	xh = x/100; //x 백의 자리수
+	yh = y/100; //y 백의 자리수
+	zh = z/100; //z 백의 자리수
+
+	char ch[3];
+
+	// 각 수의 백의 자리수가 모두 같으면 T
+	ch[0] = 'T' * (xh == yh && yh == zh);
+	// 두 수의 백의 자리수만 같으면 D
+	ch[1] =
+		'D' *
+		(ch[0] == 0) * /* 근데 모두 같으면 출력하면 안 됨 */
+		(xh == yh || yh == zh || zh == xh);
+	// 백의 자리수가 모두 다르면 S
+	ch[2] = 'S' * (xh != yh && yh != zh && zh != xh);
+
+	//T,D,S를 입력받는 변수 ch를 정의하고 각 조건에 맞는 문자를 대입(조건이 거짓이면 0을 곱해서 무효처리)
+	printf("%c%c%c\n", ch[0], ch[1], ch[2]); //ch 출력
+
+	return 0;
+}
diff --git a/qna/subproc.c b/qna/subproc.c
new file mode 100644
index 0000000..160492d
--- /dev/null
+++ b/qna/subproc.c
@@ -0,0 +1,4 @@
+#include <stdio.h>
+
+
+int main 
\ No newline at end of file
diff --git a/qna/아픈뜸부기_a.c b/qna/아픈뜸부기_a.c
new file mode 100644
index 0000000..4022b8d
--- /dev/null
+++ b/qna/아픈뜸부기_a.c
@@ -0,0 +1,34 @@
+#define _CRT_SECURE_NO_WARNING // https://blog.hcmc.studio/73
+#include <stdio.h>
+
+int main (void) {
+	int n, num;
+	int sum = 0;
+	int a, b, c, d;
+
+	printf("4자리 정수를 입력하시오: ");
+	scanf("%d", &n);
+	num = n;
+	printf("\n");
+
+	a = n % 1000 % 100 % 10;
+	printf("\tn = %4d --> 일의 자리값 --> %d \n", n, a);
+	n = n % 1000;
+
+	b = n / 10 % 10;
+	printf("\tn = %4d --> 십의 자리값 --> %d \n", n, b);
+	n = n / 100;
+
+	c = n % 100 % 10;
+	printf("\tn = %4d --> 백의 자리값 --> %d \n", n, c);
+	n = n % 10;
+
+	d = n % 10;
+	printf("\tn = %4d --> 천의 자리값 --> %d \n", n, d);
+	n = n % 10;
+
+	sum = d + c + b + a;
+	printf("n = %4d --> %d + %d + %d + %d = %d \n", num, a, b, c, d, sum);
+
+	return 0;
+}
diff --git a/qna/아픈뜸부기_b.c b/qna/아픈뜸부기_b.c
new file mode 100644
index 0000000..808100a
--- /dev/null
+++ b/qna/아픈뜸부기_b.c
@@ -0,0 +1,37 @@
+#define _CRT_SECURE_NO_WARNING // https://blog.hcmc.studio/73
+#include <stdio.h>
+
+int main (void) {
+	static const char *STR_ARR[] = {
+		"일",
+		"십",
+		"백",
+		"천",
+	};
+	static const size_t STR_ARR_LEN = sizeof(STR_ARR) / sizeof(const char*);
+
+	int n, num;
+	int sum = 0;
+	int h[STR_ARR_LEN];
+
+	printf("4자리 정수를 입력하시오: ");
+	scanf("%d", &n);
+	num = n;
+	printf("\n");
+
+	for (size_t i = 0; i < STR_ARR_LEN; i += 1) {
+		h[i] = n % 10;
+		sum += h[i];
+
+		printf("\tn = %4d --> %s의 자리값 --> %d \n", n, STR_ARR[i], h[i]);
+		n /= 10;
+	}
+
+	printf("\nn = %4d --> ", num);
+	for (size_t i = 0; i < STR_ARR_LEN; i += 1) {
+		printf("%d %c ", h[i], i + 1 == STR_ARR_LEN ? '=' : '+');
+	}
+	printf("%d\n", sum);
+
+	return 0;
+}
diff --git a/snippets/clipblink.c b/snippets/clipblink.c
new file mode 100644
index 0000000..d84ca75
--- /dev/null
+++ b/snippets/clipblink.c
@@ -0,0 +1,104 @@
+// https://github.com/cdown/clipnotify
+
+#define _DEFAULT_SOURCE
+#include <X11/Xatom.h>
+#include <X11/Xlib.h>
+#include <X11/extensions/Xfixes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static enum selections {
+	NONE = 0,
+	SELECTION_CLIPBOARD = (1 << 0),
+	SELECTION_PRIMARY = (1 << 1),
+	SELECTION_SECONDARY = (1 << 2)
+} selections = NONE;
+
+static int loop;
+
+int main(int argc, char *argv[]) {
+	static const char *usage =
+		"%s: Notify by exiting on clipboard events.\n\n"
+		"  -l    Instead of exiting, print a newline when a new selection is available.\n"
+		"  -s    The selection to use. Available selections:\n"
+		"        clipboard, primary, secondary\n"
+		"        The default is to monitor clipboard and primary.\n";
+	Display *disp;
+	Window root;
+	Atom clip;
+	XEvent evt;
+	int opt;
+
+	while ((opt = getopt(argc, argv, "hs:l")) != -1) {
+		switch (opt) {
+			case 'h':
+				printf(usage, argv[0]);
+				return EXIT_SUCCESS;
+			case 'l':
+				loop = 1;
+				break;
+			case 's': {
+				char *token = strtok(optarg, ",");
+				while (token != NULL) {
+					if (strcmp(token, "clipboard") == 0) {
+						selections |= SELECTION_CLIPBOARD;
+					} else if (strcmp(token, "primary") == 0) {
+						selections |= SELECTION_PRIMARY;
+					} else if (strcmp(token, "secondary") == 0) {
+						selections |= SELECTION_SECONDARY;
+					} else {
+						fprintf(stderr, "Unknown selection '%s'\n", token);
+						return EXIT_FAILURE;
+					}
+					token = strtok(NULL, ",");
+				}
+				break;
+			}
+			default:
+				fprintf(stderr, usage, argv[0]);
+				return EXIT_FAILURE;
+		}
+	}
+
+	disp = XOpenDisplay(NULL);
+	if (!disp) {
+		fprintf(stderr, "Can't open X display\n");
+		return EXIT_FAILURE;
+	}
+
+	root = DefaultRootWindow(disp);
+
+	clip = XInternAtom(disp, "CLIPBOARD", False);
+
+	/* <= 1.0.2 backwards compatibility */
+	if (!selections)
+		selections = SELECTION_CLIPBOARD | SELECTION_PRIMARY;
+
+	if (selections & SELECTION_CLIPBOARD)
+		XFixesSelectSelectionInput(disp, root, clip,
+								   XFixesSetSelectionOwnerNotifyMask);
+	if (selections & SELECTION_PRIMARY)
+		XFixesSelectSelectionInput(disp, root, XA_PRIMARY,
+								   XFixesSetSelectionOwnerNotifyMask);
+	if (selections & SELECTION_SECONDARY)
+		XFixesSelectSelectionInput(disp, root, XA_SECONDARY,
+								   XFixesSetSelectionOwnerNotifyMask);
+
+	if (loop) {
+		(void)setvbuf(stdout, NULL, _IONBF, 0);
+		do {
+			XNextEvent(disp, &evt);
+
+		for (unsigned int i = 0; i < 2; i += 1) {
+			printf("%c", 0);
+			fflush(stdout);
+			usleep(50000);
+		}
+		} while (1);
+	} else {
+		XNextEvent(disp, &evt);
+	}
+	XCloseDisplay(disp);
+}