#include <stdio.h>
 
int main() {
    int choice;
    float radius, height, length, width;
 
    printf("เลือกชนิดของรูปทรง\n");
    printf("1. ทรงกลม\n");
    printf("2. ทรงกระบอก\n");
    printf("3. ลูกบาศก์\n");
    printf("กรุณาเลือกหมายเลข (1-3): ");
    scanf("%d", &choice);
 
    if (choice == 1) {
        // คำนวณปริมาตรทรงกลม
        printf("กรอกรัศมีของทรงกลม: ");
        scanf("%f", &radius);
 
        if (radius > 0) {
            printf("ปริมาตรของทรงกลมคือ %.2f ลูกบาศก์หน่วย\n", (4.0 / 3.0) * 3.14159 * radius * radius * radius);
        } else {
            printf("รัศมีต้องมีค่ามากกว่า 0\n");
        }
    } else if (choice == 2) {
        // คำนวณปริมาตรทรงกระบอก
        printf("กรอกรัศมีของฐานทรงกระบอก: ");
        scanf("%f", &radius);
        printf("กรอกความสูงของทรงกระบอก: ");
        scanf("%f", &height);
 
        if (radius > 0 && height > 0) {
            printf("ปริมาตรของทรงกระบอกคือ %.2f ลูกบาศก์หน่วย\n", 3.14159 * radius * radius * height);
        } else {
            printf("รัศมีและความสูงต้องมีค่ามากกว่า 0\n");
        }
    } else if (choice == 3) {
        // คำนวณปริมาตรลูกบาศก์
        printf("กรอกความยาวด้านของลูกบาศก์: ");
        scanf("%f", &length);
 
        if (length > 0) {
            printf("ปริมาตรของลูกบาศก์คือ %.2f ลูกบาศก์หน่วย\n", length * length * length);
        } else {
            printf("ความยาวด้านต้องมีค่ามากกว่า 0\n");
        }
    } else {
        // กรณีที่ตัวเลือกไม่ถูกต้อง
        printf("คุณเลือกตัวเลือกไม่ถูกต้อง\n");
    }
 
    return 0;
}

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