CapitalizeFirsr c+ 2

 #include <iostream>

#include <algorithm>

#include <string>

int main(){

std::string frase;

std::cout << "Inserisci la frase: ";

std::getline(std::cin,frase);

frase[0]= toupper(frase[0]);

for( int i = 0; i < frase.length();i++) {

if (std::isspace(frase[i]))

  {

   frase[i+1] = toupper(frase[i+1]);

  }

}

std::cout <<frase;

    return EXIT_SUCCESS;

}