Call By Value Pointer Parameter

// Call-by-value parameter behavior.
#include <iostream>
void sneaky(int *temp);

int main(){
	int *p = new int(101);
	std::cout << "Before function call:     *p == " << *p << std::endl;
	sneaky(p);
	std::cout << "After function call:      *p == " << *p << std::endl;
	return 0;
}

void sneaky(int *temp){
	*temp = 1337;
	std::cout << "Inside the function call: *temp == " << *temp << std::endl;
}

Dissect Mailing Address

// Dissecting a mailing address without regex.
#include <iostream>
#include <string>
#include <cctype>

int main(){
	std::string a = "", s = "", c = "", p = "", z = "";
	std::cout << "Enter an address (or just hit enter): (format: 313 Blah Street, New York NY 90210)\n";
	getline(std::cin, a);
	if(a.empty()) a = "313 Blah Street, New York NY 90210";
	do{
		// Find the street.
		for(int i = 0; i < a.size(); i++){
			if(a[i] == ',' && s.empty()){
			s = a.substr(0, i);
			a.erase(0, i + 2);
			}
		}
		// Find the city.
		for(int i = 0; i < a.size(); i++){
			if(isupper(a[i]) && isupper(a[i + 1]) && isspace(a[i + 2])){
				c = a.substr(0, i - 1);
				a.erase(0, i);
			}
		}
		// Find the state.
		p = a.substr(0, 2);
		a.erase(0, 3);
		
		// Find the zip.
		z = a;
		a = "";
	}while(!a.empty());
	std::cout << "Street: " << s << std::endl;
	std::cout << "City:   " << c << std::endl;
	std::cout << "State:  " << p << std::endl;
	std::cout << "Zip:    " << z << std::endl;
}