#include <math.h>
#include <stdio.h>
#include <string.h>
int main (int argc, char** argv) {
  double pi_d = 3.14159265358979323846;
  double sin_d = sin(pi_d);
  printf("pi = %.33f\n   + %.33f\n", pi_d, sin_d);

  char pi_s[100]; char sin_s[100]; char result_s[100] = {};
  snprintf(pi_s, sizeof(pi_s), "%.33f",pi_d);
  snprintf(sin_s, sizeof(sin_s), "%.33f", sin_d);
  int carry = 0;
  for (int i = strlen(pi_s) ;i >= 0; --i) {
    result_s[i] = pi_s[i];
    if (pi_s[i] != '.') {
      char d = pi_s[i] + sin_s[i] + carry - '0' * 2;
      carry = d > 9;
      result_s[i] = d % 10 + '0';
    }
  }
  printf(" %s\n", result_s);
  return 0;
}