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  1. #include <stdio.h>
  2.  
  3. // ฟังก์ชันบวก
  4. int add(int a, int b) {
  5.     return a + b;
  6. }
  7.  
  8. // ฟังก์ชันลบ
  9. int subtract(int a, int b) {
  10.     return a - b;
  11. }
  12.  
  13. // ฟังก์ชันคูณ
  14. int multiply(int a, int b) {
  15.     return a * b;
  16. }
  17.  
  18. // ฟังก์ชันหาร
  19. float divide(int a, int b) {
  20.     if (b != 0) {
  21.         return (float)a / b;
  22.     } else {
  23.         printf("Error: Division by zero\n");
  24.         return 0;
  25.     }
  26. }
  27.  
  28. // ฟังก์ชันอินทิเกรต
  29. double integrate(double a, double b, double (*f)(double)) {
  30.     double area = 0;
  31.     double dx = 0.0001; // ความกว้างของแท่งสำหรับการแยกพื้นที่
  32.     for (double x = a; x < b; x += dx) {
  33.         area += f(x) * dx;
  34.     }
  35.     return area;
  36. }
  37.  
  38. // ฟังก์ชันดิฟ
  39. double differentiate(double x, double (*f)(double)) {
  40.     double dx = 0.0001;
  41.     double fx_plus_dx = f(x + dx);
  42.     double fx_minus_dx = f(x - dx);
  43.     return (fx_plus_dx - fx_minus_dx) / (2 * dx);
  44. }
  45.  
  46. // ฟังก์ชัน f(x) = x^2
  47. double square(double x) {
  48.     return x * x;
  49. }
  50.  
  51. int main() {
  52.     int num1, num2;
  53.     printf("Enter two numbers: ");
  54.     scanf("%d %d", &num1, &num2);
  55.  
  56.     printf("Addition: %d\n", add(num1, num2));
  57.     printf("Subtraction: %d\n", subtract(num1, num2));
  58.     printf("Multiplication: %d\n", multiply(num1, num2));
  59.     printf("Division: %.2f\n", divide(num1, num2));
  60.  
  61.     double a, b;
  62.     printf("Enter integration bounds (a b): ");
  63.     scanf("%lf %lf", &a, &b);
  64.     printf("Integration of x^2 from %.2f to %.2f: %.2f\n", a, b, integrate(a, b, square));
  65.  
  66.     double point;
  67.     printf("Enter a point for differentiation: ");
  68.     scanf("%lf", &point);
  69.     printf("Differentiation at %.2f: %.2f\n", point, differentiate(point, square));
  70.  
  71.     return 0;
  72. }
Success #stdin #stdout 0s 5280KB
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stdin
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Standard input is empty
stdout
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Enter two numbers: Addition: 0
Subtraction: 0
Multiplication: 0
Error: Division by zero
Division: 0.00
Enter integration bounds (a b): Integration of x^2 from 0.00 to 0.00: 0.00
Enter a point for differentiation: Differentiation at 0.00: 0.00
https://ideone.com/LnFj8w
language:
C (gcc 8.3)
created:
16 days ago
visibility:
public

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