finished

programs/Makefile

@@ -0,0 +1,17 @@
+CC=gcc
+CFLAGS=-Wall
+
+demo:
+	$(CC) $(CFLAGS) -nolibc -nostdlib -O0 demo.c -o build/demo
+
+prog1:
+	$(CC) $(CFLAGS) prog1.c -o build/prog1
+
+prog2:
+	$(CC) $(CFLAGS) prog2.c -o build/prog2
+
+prog3:
+	$(CC) $(CFLAGS) prog3.c -o build/prog3
+
+prog4:
+	$(CC) $(CFLAGS) prog4.c -o build/prog4

programs/prog2.c

@@ -1,9 +1,7 @@
 #include <stdio.h>
 
 int main(void) {
-    printf("C\n");
-    printf("言\n");
-    printf("語\n");
+    printf("C\n言\n語\n");
 
     return 0;
 }

programs/prog3.c

@@ -1,10 +1,7 @@
 #include <stdio.h>
 
 int main(void) {
-    printf("情\n");
-    printf("　報\n");
-    printf("　　処\n");
-    printf("　　　理\n");
+    printf("情\n　報\n　　処\n　　　理\n");
 
     return 0;
 }