From cdcf1a079b0cac398a6eebb87d4bd9ddebadcd97 Mon Sep 17 00:00:00 2001
From: yenru0 <yenru0604@gmail.com>
Date: Mon, 13 Oct 2025 03:18:15 +0900
Subject: [PATCH] fix makefile for hw3 and add hw3/*.dat and main.c

---
 Makefile           |  9 ++++---
 hws/hw3/lineq1.dat |  6 +++++
 hws/hw3/lineq2.dat |  7 ++++++
 hws/hw3/lineq3.dat |  8 ++++++
 hws/hw3/main.c     | 62 ++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 89 insertions(+), 3 deletions(-)
 create mode 100644 hws/hw3/lineq1.dat
 create mode 100644 hws/hw3/lineq2.dat
 create mode 100644 hws/hw3/lineq3.dat
 create mode 100644 hws/hw3/main.c

diff --git a/Makefile b/Makefile
index be43c08..88be8b3 100644
--- a/Makefile
+++ b/Makefile
@@ -18,8 +18,8 @@ else
 		LIB_SRCS := $(LIB_DIR)/recipes/machar.c
 	else ifeq ($(strip $(hw)),2)
 		LIB_SRCS := $(LIB_DIR)/other/nrutil.c $(LIB_DIR)/recipes/rtflsp.c $(LIB_DIR)/recipes/rtbis.c $(LIB_DIR)/recipes/rtsec.c $(LIB_DIR)/recipes/rtnewt.c $(LIB_DIR)/recipes/rtsafe.c $(LIB_DIR)/recipes/zbrak.c $(LIB_DIR)/recipes/bessj0.c $(LIB_DIR)/recipes/bessj1.c
-	else
-		LIB_SRCS := ""
+	else ifeq ($(strip $(hw)),3)
+		LIB_SRCS := $(LIB_DIR)/other/nrutil.c $(LIB_DIR)/recipes/gaussj.c $(LIB_DIR)/recipes/ludcmp.c $(LIB_DIR)/recipes/svdcmp.c $(LIB_DIR)/recipes/mprove.c $(LIB_DIR)/recipes/lubksb.c $(LIB_DIR)/recipes/pythag.c
 	endif
 	LIB_OBJS := $(patsubst %.c,$(BUILD_DIR)/lib/%.o,$(notdir $(LIB_SRCS)))
 
@@ -65,7 +65,10 @@ $(OBJS): %.o:
 run: clean build
 	@echo "실행 시작"
 	@echo "============"
-	@$(TARGET_EXEC)
+	@if ls $(SRC_DIR)/*.dat >/dev/null 2>&1; then \
+		cp -f $(SRC_DIR)/*.dat build/; \
+	fi
+	@cd build && ./$(TARGET_NAME).out
 
 dist: clean
 	mkdir -p out
diff --git a/hws/hw3/lineq1.dat b/hws/hw3/lineq1.dat
new file mode 100644
index 0000000..330b036
--- /dev/null
+++ b/hws/hw3/lineq1.dat
@@ -0,0 +1,6 @@
+4	4		
+4	2	3	-1
+-2	-1	-2	2
+5	3	4	-1
+11	4	6	1
+4	-3	4	11	
diff --git a/hws/hw3/lineq2.dat b/hws/hw3/lineq2.dat
new file mode 100644
index 0000000..4f5f1a6
--- /dev/null
+++ b/hws/hw3/lineq2.dat
@@ -0,0 +1,7 @@
+5	5
+2	-4	-5	5	0			
+-1	1	2	0	4
+-1	6	0	3	2
+0	1	3	7	5
+5	0	8	7	-2
+-5	2	0	4	-1	
diff --git a/hws/hw3/lineq3.dat b/hws/hw3/lineq3.dat
new file mode 100644
index 0000000..e537516
--- /dev/null
+++ b/hws/hw3/lineq3.dat
@@ -0,0 +1,8 @@
+6 6
+0.4 8.2 6.7 1.9 2.2 5.3
+7.8 8.3 7.7 3.3 1.9 4.8
+5.5 8.8 3.0 1.0 5.1 6.4
+5.1 5.1 3.6 5.8 5.7 4.9
+3.5 2.7 5.7 8.2 9.6 2.9
+3.0 5.3 5.6 3.5 6.8 5.7
+-2.9 -8.2 7.7 -1.0 5.7 3.0
diff --git a/hws/hw3/main.c b/hws/hw3/main.c
new file mode 100644
index 0000000..3a5f456
--- /dev/null
+++ b/hws/hw3/main.c
@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+void exit(int status) {
+    static void (*real_exit)(int) = 0;
+    if (!real_exit) {
+        real_exit = dlsym(RTLD_NEXT, "exit");
+    }
+    printf("HI");
+}
+
+#include "nr.h"
+#include "nrutil.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+void print_matrix(int m, int n, float **mat) {
+    int i, j;
+    for(i = 1; i <= m; i ++) {
+        for(j = 1; j <= n; j ++) {
+            printf("%6.2f ", mat[i][j]);
+        }
+        printf("\n");
+    }
+}
+
+int main() {
+    int m, n;
+    int i, j;
+    FILE *fp = fopen("lineq1.dat", "r");
+
+    if(fp == NULL) {
+        printf("Error opening file");
+        exit(1);
+    }
+
+    fscanf(fp, "%d", &m); /* row */
+    fscanf(fp, "%d", &n); /* col */
+
+    float** a = matrix(1, m, 1, n);
+    
+    for(i = 1;i <= m; i ++) {
+        for(j = 1;j <= n; j ++) {
+            fscanf(fp, "%f", &a[i][j]);
+        }
+    }
+    float **b = matrix(1, m, 1, 1);
+    for(i = 1; i<= m; i++) {
+        fscanf(fp, "%f", &b[i][1]);
+    }
+
+    fclose(fp);
+    print_matrix(m, n, a);
+    print_matrix(m, 1, b);
+    gaussj(a, n, b, m);
+    print_matrix(m, n, a);
+    print_matrix(m, 1, b);
+    
+    
+    return 0;
+}
\ No newline at end of file