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TWEET # Untitled a guest Feb 15th, 2020 65 Never
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1. #include <stdio.h>
2. #include <math.h>
3.
4. double fact(double d) {
5.     if (d < 1) {
6.         return 1;
7.     } else {
8.         return d*fact(d-1);
9.     }
10. }
11.
12.
13.
14. int main() {
15.     double x, part, sum = 0, eps, diff;
16.     int n = 0 ,i = 1;;
17. //    x = 3.14;
18. //    eps = 0.0001;
19.     scanf("%lf %lf", &x, &eps);
20.     if (eps > 0 && eps < 1) {
21.         diff = 1 + eps;
22.         part = x;
23.         //printf("%f %f %f", sin(x)-sum, eps);
24.
25. //printf("%lf", fact(3));
26.         for (i = 1; diff > eps; i++){
27.
28.             sum += part;
29.             //part =  pow((-1),i-1) * pow(x, 2 * i - 1) /fact(2 * i - 1);
30.             part*= (-1) * x * x / (2. * i)/(2. * i + 1.);
31.             diff = fabs(sin(x)-sum);
32.             n++;
33.         }
34.
35. printf("%s %lf %s %lf %s %d", "x = ",x," sum = ",sum," n = " ,n);
36.
37.
38.
39.
40. //    0     0.001   0
41. //    3.14      0.0001  0.00161324
42. //    1.57      0.00001 1
43. //    1.05      0.0001  0.86602
44. //    2.06      0.0001  0.869296   // mine is  0.882776
45.
46.
47.
48.    } else{printf("%s", "Invalid data");}
49.     return 0;
50. }
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