Помогите написать программу на языке "С"

#define _USE_MATH_DEFINES
#include
#include
#include
#include
int main () {
double x = -M_PI, k, dx = M_PI / 180, sin_x, Fx;
HANDLE hCon = GetStdHandle(STD_OUTPUT_HANDLE);
COORD dwSize;
dwSize.X = 80;
dwSize.Y = 400;
SetConsoleScreenBufferSize(hCon, dwSize);
do {
sin_x = sin(x);
if (sin_x >= 0) k = x * x;
else k = fabs(x);
if (k < x) Fx = fabs(x);
else Fx = k * x;
printf(" x =.6Lf sin(x) =.6f k =.6f F(x) =.15f\n", x, sin_x, k, Fx);
x += dx;
} while (x < M_PI);
getchar();
return 0;
}