#include <stdio.h>
#include <math.h>

double a=0,s=0,m=0,d=0;
int g=0;

int main(void)
{
  double x=0, y=0;
  int option,g;

  printf("******* Calculator ********\n");
  printf("1: Cosine(x)\n");
  printf("2: Sine(x)\n");
  printf("3: Tangent(x)\n");
  printf("4: Sine(x)/Cosine(x)\n");
  printf("5: Square root(x)\n");
  printf("6: Exponential(x)\n");
  printf("7: Natural log(x)\n");
  printf("8: Log to base 10(x)\n");
  printf("9: Absolute value(x)\n");
  printf("10: Ceil to int(x)\n");
  printf("11: Floor to int(x)\n");
  printf("12: Quit\n");

  printf("Enter choice from 1-11, 12 to quit: ");
  scanf("%d",&option);
  printf("Enter the number: ");
  scanf("%lf",&x);

  switch (option)
  {
    case 1:
      y = cos(x);
      printf("Cos(%f) = %f\n",x,y);
      break;
    case 2:
      y = sin(x);
      printf("Sin(%f) = %f\n",x,y);
      break;
    case 3:
      y = tan(x);
      printf("Tan(%f) = %f\n",x,y);
      break;
    case 4:
      y = sin(x)/cos(x);
      printf("Sin(%f)/Cos(%f) = %f\n",x,x,y);
      break;
    case 5:
      y = sqrt(x);
      printf("Sqrt(%f) = %f\n",x,y);
      break;   
    case 6:
      y = exp(x);
      printf("exp(%f) = %f\n",x,y);
      break;   
    case 7:
      y = log(x);
      printf("log(%f) = %f\n",x,y);
      break;   
    case 8:
      y = log10(x);
      printf("log10(%f) = %f\n",x,y);
      break;   
    case 9:
      y = fabs(x);
      printf("abs(%f) = %f\n",x,y);
      break;   
    case 10:
      g = ceil(x);
      printf("ceil(%f) = %d\n",x,g);
      break;   
    case 11:
      g = floor(x);
      printf("floor(%f) = %d\n",x,g);
      break;   
    case 12:
      printf("Quitting!!!!!\n");
      break;
  }
  return 0;
}