Table creation/Postal addresses: Difference between revisions
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return EXIT_SUCCESS;
}</syntaxhighlight>
=={{header|C++}}==
This example completes the task with a random access file, instead of using an external library.
<syntaxhighlight lang="c++">
#include <cstdint>
#include <fstream>
#include <iostream>
#include <string>
#include <vector>
class Address {
public:
Address(const std::string& aName, const std::string& aStreet, const std::string& aCity,
const std::string& aState, const std::string& aZipCode)
: name(aName), street(aStreet), city(aCity), state(aState), zipCode(aZipCode) {}
std::string address_record() {
std::string record;
record += fixed_length(name, 30);
record += fixed_length(street, 30);
record += fixed_length(city, 15);
record += fixed_length(state, 5);
record += fixed_length(zipCode, 10);
return record;
}
static constexpr uint32_t RECORD_LENGTH = 90;
private:
std::string fixed_length(const std::string& text, const uint64_t& size) {
return ( text.length() > size ) ? text.substr(0, size) : text + std::string(size - text.length(), ' ');
}
std::string name, street, city, state, zipCode;
};
int main() {
std::vector<Address> addresses = {
Address("FSF Inc.", "51 Franklin Street", "Boston", "MA", "02110-1301"),
Address("The White House", "1600 Pennsylvania Avenue NW", "Washington", "DC", "20500"),
Address("National Security Council", "1700 Pennsylvania Avenue NW", "Washington", "DC", "20500")
};
std::fstream file("addresses.dat", std::ios::app | std::ios::in | std::ios::out);
if ( ! file ) {
std::cerr << "Error. Cannot open file." << std::endl;
exit(EXIT_FAILURE);
}
for ( uint64_t i = 0; i < addresses.size(); ++i ) {
file.seekp(i * Address::RECORD_LENGTH, std::ios::beg);
file << addresses[i].address_record();
}
for ( uint64_t i = 0; i < addresses.size(); ++i ) {
file.seekg(i * Address::RECORD_LENGTH, std::ios::beg);
char ch;
std::string address;
while ( address.length() < Address::RECORD_LENGTH ) {
file.get(ch);
address += ch;
}
std::cout << address << std::endl;
}
file.close();
}
</syntaxhighlight>
{{ out }}
<pre>
FSF Inc. 51 Franklin Street Boston MA 02110-1301
The White House 1600 Pennsylvania Avenue NW Washington DC 20500
National Security Council 1700 Pennsylvania Avenue NW Washington DC 20500
</pre>
=={{header|Clojure}}==
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