progress

programs/a5/main.c

@@ -0,0 +1,54 @@
+#include <stdio.h>
+
+#define ADD 1
+#define SUB 2
+#define MUL 3
+#define DIV 4
+
+int main(void) {
+    double a, b;
+    int op;
+    int retry = 1;
+
+    do {
+        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;
+        }
+
+	    printf("Retry? [1/0]: ");
+	    scanf("%d", &retry);
+    } while (retry == 1);
+
+    return 0;
+}