LearningCPP/main.cpp

#include <iostream>
#include <list>
#include <vector>
#include <map>
#include <iomanip>

using string = std::string;
using wordcount = std::map<string,int>;

//Place in header!
template <typename T>
void printm(T m){
  std::cout << m;
}

template <typename T>
void printlm(T m){
  printm(m);
  printm("\n");
}

int prompti(string,bool*);
double promptd(string,bool*);
string prompts(string,bool*);
double avg(std::list<double>*);
void countw(std::list<string>&, wordcount*);
void histogram(wordcount&);
void spacep(int);
void histogramp(int);

int main() {
  printlm("Get histogram of input:");
  bool s {};
  std::list<string> lst {};
  do {
    auto v = prompts("", &s);
    if (s) lst.push_back(v);
  } while (s);
  printlm("Histogram:");
  wordcount wc {};
  countw(lst,&wc);
  histogram(wc);
  return 0;
}

int prompti(string message, bool *status) {
  int tr {};
  *status = false;
  std::cout << message;
  if (!(std::cin >> tr)){
    std::cin.clear();
    std::cin.ignore();
    return 0;
  }
  *status = true;
  return tr;
}

double promptd(string message, bool *status) {
  double tr {};
  *status = false;
  std::cout << message;
  if (!(std::cin >> tr)){
    std::cin.clear();
    std::cin.ignore();
    return 0.0;
  }
  *status = true;
  return tr;
}

string prompts(string message, bool *status) {
  string tr {""};
  *status = false;
  std::cout << message;
  if (!(std::cin >> tr)){
    std::cin.clear();
    std::cin.ignore();
    return "";
  }
  *status = true;
  return tr;
}

double avg(std::list<double> *values) {
  double sum {};
  for (const auto c : *values) sum += c;
  return sum / values->size();
}

void countw(std::list<string> &values, wordcount *holder) {
  for (const auto &c : values) {
    ++(*holder)[c];
  }
}

void histogram(wordcount &wc) {
  int maxl {};
  for (const auto c : wc) if (c.first.length() > maxl) maxl = c.first.length();
  for (const auto c : wc) {
    printm(c.first);
    spacep(1 + maxl - c.first.length());
    histogramp(c.second);
  }
}

void spacep(int num) {
  for (auto i = 0; i < num; ++i) printm(" ");
}

void histogramp(int num) {
  for (auto i = 1; i <= num; ++i) if (i == num) printlm("*"); else printm("*");
}