#include <iostream> #include <string> using namespace std; string dec_to_numeral(int x) { int dec[13] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1}; string num[13] = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"}; string numeral; for(int i = 0; i < 13; i++) { while (x >= dec[i]) { x -= dec[i]; numeral.append(num[i]); } } return numeral; } int main() { //example cout << dec_to_numeral(400); return 0; }
Posts Tagged ‘cpp’
Decimal to Roman Numeral Conversion
Monte Carlo Generation of Pi
21. May 2009
#include <stdio.h> #include <stdlib.h> #include <time.h> #include <math.h> int main () { int in = 0; srand(time(NULL)); for(int i = 0; i < 1000000; i++) { float x = (rand()%1000000)/1000000.0; float y = (rand()%1000000)/1000000.0; double r = sqrt((pow(x,2)+pow(y,2))); if(r <= 1) in++; } printf("percent error=%fn", ((((4*in/1000000.0)-3.141592)/3.141592)*100)); printf("pi=%fn", (4*in/1000000.0)); return 0; }
21. May 2009
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