draft

programs/calc/info.json

@@ -1,10 +1,10 @@
 {
-  "language": "",
-  "name": "",
-  "description": "",
+  "language": "C",
+  "name": "簡易電卓",
+  "description": "2つの実数を入力し、四則演算を指定し、小数点6桁で結果を表示する。0 divも考慮すること。",
   "output": {
-    "type": "screenshot | text",
-    "content": ""
+    "type": "screenshot",
+    "content": "./assets/calc.png"
   },
   "note": ""
 }

programs/calc/main.c

@@ -0,0 +1,48 @@
+#include <stdio.h>
+
+#define ADD 1
+#define SUB 2
+#define MUL 3
+#define DIV 4
+
+int main(void) {
+    double a, b;
+    int op;
+
+    printf("Input first number: ");
+    scanf("%lf", &a);
+    printf("Input second number: ");
+    scanf("%lf", &b);
+
+    printf("Select Operation:\n"
+           "[1]: Addition\n"
+           "[2]: Subtraction\n"
+           "[3]: Multiplication\n"
+           "[4]: Division\n"
+           "> ");
+    scanf("%d", &op);
+
+    switch (op) {
+        case ADD:
+            printf("ANS: %lf\n", a + b);
+            break;
+        case SUB:
+            printf("ANS: %lf\n", a - b);
+            break;
+        case MUL:
+            printf("ANS: %lf\n", a * b);
+            break;
+        case DIV:
+            if (b == 0.0) {
+                puts("Zero Division");
+                return 1;
+            }
+            printf("ANS: %lf\n", a / b);
+            break;
+        default:
+            puts("Undefined Operation");
+            return 1;
+    }
+
+    return 0;
+}

programs/ifvswitch/gen-if.py

@@ -0,0 +1,8 @@
+with open("./ifs.c", mode='w') as file:
+    num = 100000
+    file.write("int comp(int x) {\n    if (x == 0) {\n        return 0;\n    } ")
+    for i in range(1,num-1):
+        s = f"else if (x == {i}) {{\n        return {i};\n    }} "
+        file.write(s)
+    file.write(f"else {{\n        return {num-1};\n    }}\n}}")
+    file.write(f"\n\nint main(void) {{\n    for (int i = 0; i < {num}; i++) {{        \n        comp(i);\n    }}\n    return 0;\n}}\n")

programs/ifvswitch/gen-switch.py

@@ -0,0 +1,8 @@
+with open("./switch-case.c", mode='w') as file:
+    num = 100000
+    file.write("int comp(int x) {\n    switch (x) {\n")
+    for i in range(num):
+        s = f"        case {i}: return {i};\n"
+        file.write(s)
+    file.write("    }\n}")
+    file.write(f"\n\nint main(void) {{\n    for (int i = 0; i < {num}; i++) {{\n        comp(i);\n    }}\n    return 0;\n}}\n")

programs/p312/info.json

@@ -1,10 +1,10 @@
 {
-  "language": "",
-  "name": "",
-  "description": "",
+  "language": "C",
+  "name": "演習 3-12",
+  "description": "教科書のList 3-4をSwitch文で書き換えたプログラム。",
   "output": {
-    "type": "screenshot | text",
-    "content": ""
+    "type": "screenshot",
+    "content": "./assets/p312.png"
   },
   "note": ""
 }

programs/p312/main.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main(void) {
+    int n;
+
+    printf("Input Integer: ");
+    scanf("%d", &n);
+
+    switch (n % 2) {
+    	case 0:
+	    puts("The number is even.");
+	    break;
+	case 1:
+	    puts("The number is odd.");
+	    break;
+	default:
+	    puts("Unknown Error");
+    }
+
+    return 0;
+}

programs/p313/info.json

@@ -1,10 +1,10 @@
 {
-  "language": "",
-  "name": "",
-  "description": "",
+  "language": "C",
+  "name": "演習 3-13",
+  "description": "教科書のList 3-18 をSwitch文で書き換えたプログラム。",
   "output": {
-    "type": "screenshot | text",
-    "content": ""
+    "type": "screenshot",
+    "content": "./assets/p313.png"
   },
   "note": ""
 }

programs/p313/main.c

@@ -0,0 +1,35 @@
+#include <stdio.h>
+
+int main(void) {
+    int month;
+
+    printf("Input month: ");
+    scanf("%d", &month);
+
+    switch (month) {
+        case 12:
+        case 1:
+        case 2:
+            puts("It is winter.");
+            break;
+        case 3:
+        case 4:
+        case 5:
+            puts("It is spring.");
+            break;
+        case 6:
+        case 7:
+        case 8:
+            puts("It is summer.");
+            break;
+        case 9:
+        case 10:
+        case 11:
+            puts("It is autumn.");
+            break;
+        default:
+            puts("Unknown month.");
+    }
+
+    return 0;
+}