#include<iostream>
#include<vector>
unsigned count_digits (unsigned num, const unsigned base=10)
{
unsigned count=1;
while (num/=base) ++count;
return count;
}
class number
{
std::vector<unsigned> value;
unsigned base;
public:
number (const unsigned _value, const unsigned _base=10): value {}, base {_base} { *this = _value; }
number& operator= (const unsigned _value);
operator unsigned () const;
bool is_narcissistic () const;
};
number& number::operator= (unsigned _value)
{
unsigned count = count_digits (_value, base);
value.resize (count);
while (count)
{
value[value.size()-count--] = _value%base;
_value/=base;
}
return *this;
}
number::operator unsigned () const
{
unsigned num = 0;
for (unsigned index=0; index<value.size(); ++index)
num += value[index]*static_cast<unsigned>(std::pow (base, index));
return num;
}
bool number::is_narcissistic () const
{
unsigned num = 0;
for (unsigned index=0; index<value.size(); ++index)
num += static_cast<unsigned>(std::pow (value[index], value.size()));
return num == static_cast<unsigned> (*this);
}
unsigned main()
{
const unsigned min=1;
const unsigned max=100;
std::cout << "Narcissistic numbers in the range " << min << " through " << max << ":\n\t";
for (unsigned n=min; n<=max; ++n)
if (number(n).is_narcissistic())
std::cout << n << ' ';
std::cout << '\n' << std::endl;
}
#include <iostream>
#include <math.h> // for std::pow()
unsigned int get_length(unsigned int num,const unsigned int base=10)
{
unsigned int len=1;
while(num && (num/=base))
++len;
return( len );
}
bool is_armstrong(const unsigned int num,const unsigned int base=10)
{
unsigned int len=get_length(num,base);
unsigned int sum=0;
unsigned int tmp=num;
while(tmp)
{
sum+=(unsigned int)std::pow((double)(tmp%base),(double)len);
tmp/=base;
}
return(num==sum);
}
int main()
{
std::cout << "Armstrong series (base 10):";
for(unsigned int num=0; num<=0xffffffff; ++num)
if(is_armstrong(num))
std::cout << " " << num;
std::cout << std::endl;
return(0);
}
how to write a program that counts automorphic number from 1 to 999
The A Plus Program is an initiative, not a test. So no, there is no answer book.
Every C plus plus program that is a main program must have the function 'main'.
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The cardinality of a set is simply the number of elements in the set. If the set is represented by an STL sequence container (such as std::array, std::vector, std::list or std::set), then the container's size() member function will return the cardinality. For example: std::vector<int> set {2,3,5,7,11,13}; size_t cardinality = set.size(); assert (cardinality == 6);
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how to write a program that counts automorphic number from 1 to 999
Exit the program and relaunch it.
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The A Plus Program is an initiative, not a test. So no, there is no answer book.
Yes, you can program games with C++.
for (int i=1; i<20; i+=2) printf ("%d\n", i);
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.25 * The Number of items in the list plus 1 equals the Item Number that is the lower quartile.
Because you aren't careful enough.
Every C plus plus program that is a main program must have the function 'main'.
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