50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
|
#include <stdio.h>
|
||
|
|
#include <math.h>
|
||
|
|
|
||
|
|
int main() {
|
||
|
|
|
||
|
|
int operation_counter = 0;
|
||
|
|
|
||
|
|
int n;
|
||
|
|
|
||
|
|
printf("Input n (must be a natural number): ");
|
||
|
|
scanf("%d", &n);
|
||
|
|
|
||
|
|
double result = 0;
|
||
|
|
|
||
|
|
operation_counter += 1; // result = 0
|
||
|
|
|
||
|
|
operation_counter += 2; // for loop
|
||
|
|
for (int i = 1; i <= n; i++)
|
||
|
|
{
|
||
|
|
double denominator = 1;
|
||
|
|
operation_counter += 1; // denominator = 1
|
||
|
|
|
||
|
|
operation_counter += 2; // for loop
|
||
|
|
for (int j = 1; j <= i; j++)
|
||
|
|
{
|
||
|
|
denominator *= j + cos(j);
|
||
|
|
operation_counter += 5; // denominator *= j + cos(j), j <= i, j++
|
||
|
|
}
|
||
|
|
|
||
|
|
double power_of_four = 1;
|
||
|
|
operation_counter += 1; // power_of_four = 1
|
||
|
|
|
||
|
|
operation_counter += 2; // for loop
|
||
|
|
for (int k = 1; k <= i; k++)
|
||
|
|
{
|
||
|
|
power_of_four *= 4;
|
||
|
|
operation_counter += 3; // power_of_four *= 4, k <= i, k++
|
||
|
|
}
|
||
|
|
|
||
|
|
result += (power_of_four - i) / denominator;
|
||
|
|
|
||
|
|
operation_counter += 5; // result += (power_of_four - i) / denominator, i <= n, i++
|
||
|
|
}
|
||
|
|
|
||
|
|
printf("Result = %.7f\n", result);
|
||
|
|
printf("Number of operations = %d\n", operation_counter);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|