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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. float f(float x) {
  5.  float y;
  6.  y = sin(x);
  7.  return y;
  8.  }
  9. int main(void) {
  10.  float x, dx, der, der0, der1, der2;
  11.  x = 3.14;
  12.  dx = 0.001;
  13.  der0 = (f(x+dx)-f(x-dx))/(2*dx);
  14.  der1 = (f(x+dx)-f(x))/dx;
  15.  der2 = (f(x)-f(x-dx))/dx;
  16.  der = (der0+der1+der2)/3;
  17.  printf("La derivata in %f vale %f",x,der);
  18. }
Success #stdin #stdout 0s 10320KB
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La derivata in 3.140000 vale -0.999926
https://ideone.com/vkjPdL
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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