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numsys.cpp
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numsys.cpp
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#include <cmath>
#include <string>
#include <iostream>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <algorithm>
#include "Stack.h"
#ifndef EPS
#define EPS 0.000001
#endif
using namespace std;
static char digit[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
static char num_dig[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
string upper(string str){
transform(str.begin(), str.end(), str.begin(), ::toupper);
return str;
}
int convert_to_10(string num,int R1){
int ans = 0;
num = upper(num);
char *pha = (char *)num.c_str();
char *p = pha;
int i = 0;
for (p = pha + num.size() - 1; p != pha - 1; --p)
{
for (int j = 0; j < 16; ++j)
{
if(*p == digit[j])
ans += num_dig[j] * pow(R1 , i);
}
i++;
}
return ans;
}
string convert(string num,int R1,int R2)
{
int number;
Stack <char> answer;
number = convert_to_10(num,R1);
cout << "Notes:" << number << "(10)" << endl;
while(number != 0){
answer.push(digit[number % R2]);
number = number / R2;
}
char *str = new char[answer.size()];
for (int i = 0;!answer.empty(); ++i)
{
str[i] = answer.pop();
}
string op = str;
return op;
}
void Numsys()
{
int r1,r2;
string former;
string later;
do
{
cout << "Input number and R1:" ;
cin >> former;
if(former == "q") break;
cin >> r1;
if (r1 == 0) {
cout << "R1 shouldn't be 0." << endl;
continue;
}
cout << "To R2:";
cin >> r2;
if (r2 == 0) {
cout << "R2 shouldn't be 0." << endl;
continue;
}
else if(r2 == 10){
cout << "The answer is:" << convert_to_10(former,r1) << "(" << r2 << ")" << endl;
}
else {
later = convert(former,r1,r2);
cout << "The answer is:" << later << "(" << r2 << ")" << endl;
}
cout << "q to quit." << endl;
}while (former != "q");
}