finished cls12

src/cls12/Makefile

@@ -0,0 +1,18 @@
+include ../common.mk
+
+PROJECT_NAME:=cls12
+
+TGTS:=$(patsubst %.c,%,$(wildcard *.c))
+
+all: $(TGTS) a2-alt
+
+%: %.c
+	@mkdir -p $(BUILD_PATH)/$(PROJECT_NAME)
+	$(CC) $(CFLAGS) $^ -o $(BUILD_PATH)/$(PROJECT_NAME)/$@
+
+a2-alt: a2.c
+	@mkdir -p $(BUILD_PATH)/$(PROJECT_NAME)
+	$(CC) $(CFLAGS) -D ALT_DATA $^ -o $(BUILD_PATH)/$(PROJECT_NAME)/$@
+
+clean:
+	$(RM) -drf $(BUILD_PATH)/$(PROJECT_NAME)

src/cls12/a1.c

@@ -0,0 +1,41 @@
+#include <stdio.h>
+
+#define STUDENTS_NUM 4
+
+struct student {
+    char name[20];
+    int english;
+    int mathematics;
+    int japanese;
+    double average;
+};
+
+int main(void) {
+    struct student students[] = {
+        { .name = "佐藤", .english = 82, .mathematics = 72, .japanese = 58 },
+        { .name = "秋山", .english = 77, .mathematics = 82, .japanese = 79 },
+        { .name = "永田", .english = 52, .mathematics = 62, .japanese = 39 },
+        { .name = "藤田", .english = 61, .mathematics = 82, .japanese = 88 }
+    };
+
+    for (int i = 0; i < STUDENTS_NUM; i++) {
+        students[i].average = (double)(
+            students[i].english +
+            students[i].mathematics +
+            students[i].japanese
+        ) / 3.f;
+    }
+
+    for (int i = 0; i < STUDENTS_NUM; i++) {
+        printf(
+            "%10s: 英語=%3d\t数学=%3d\t国語=%3d\t平均=%.2lf\n",
+            students[i].name,
+            students[i].english,
+            students[i].mathematics,
+            students[i].japanese,
+            students[i].average
+        );
+    }
+
+    return 0;
+}

src/cls12/a2.c

@@ -0,0 +1,73 @@
+#include <stdio.h>
+
+#define STUDENTS_NUM 4
+
+struct student {
+    char name[20];
+    int english;
+    int mathematics;
+    int japanese;
+    double average;
+};
+
+int main(void) {
+#ifdef ALT_DATA
+    struct student students[] = {
+        { .name = "佐藤", .english = 89, .mathematics = 86, .japanese = 78 },
+        { .name = "秋山", .english = 78, .mathematics = 65, .japanese = 79 },
+        { .name = "永田", .english = 64, .mathematics = 33, .japanese = 53 },
+        { .name = "藤田", .english = 89, .mathematics = 47, .japanese = 62 }
+    };
+#else
+    struct student students[] = {
+        { .name = "佐藤", .english = 82, .mathematics = 72, .japanese = 58 },
+        { .name = "秋山", .english = 77, .mathematics = 82, .japanese = 79 },
+        { .name = "永田", .english = 52, .mathematics = 62, .japanese = 39 },
+        { .name = "藤田", .english = 61, .mathematics = 82, .japanese = 88 }
+    };
+#endif
+
+    for (int i = 0; i < STUDENTS_NUM; i++) {
+        students[i].average = (double)(
+            students[i].english +
+            students[i].mathematics +
+            students[i].japanese
+        ) / 3.f;
+    }
+
+    int grades[4] = {0};
+    for (int i = 0; i < STUDENTS_NUM; i++) {
+        char grade = 0;
+        int avg = students[i].average;
+        if (avg < 60) {
+            grade = 'D';
+            grades[3]++;
+        } else if (avg >= 60 && avg < 70) {
+            grade = 'C';
+            grades[2]++;
+        } else if (avg >= 70 && avg < 80) {
+            grade = 'B';
+            grades[1]++;
+        } else {
+            grade = 'A';
+            grades[0]++;
+        }
+        printf(
+            "%10s: 英語=%3d\t数学=%3d\t国語=%3d\t平均=%.2lf\t成績=%c\n",
+            students[i].name,
+            students[i].english,
+            students[i].mathematics,
+            students[i].japanese,
+            students[i].average,
+            grade
+        );
+    }
+
+    printf("成績: ");
+    for (int i = 0; i < 4; i++) {
+        printf("%c=%d人\t", 'A' + i, grades[i]);
+    }
+    putchar('\n');
+
+    return 0;
+}