C++ examples for Data Type:string
Converting String to Number and Number to String
#include <iostream> #include <sstream> using namespace std; int StringToNumber(string MyString) { istringstream converter(MyString); // Converts from string to number. int result; // Contains the operation results. // Perform the conversion and return the results. converter >> result;//from w w w . jav a 2 s . c o m return result; } string NumberToString(int Number) { ostringstream converter; // Converts from number to string. // Perform the conversion and return the results. converter << Number; return converter.str(); } int main() { float myFloat; // Contains the theoretical number of kids. int myInt; // Contains an actual number of kids. cout << "Float to Integer" << endl; cout << "(Truncated)" << endl; myFloat = 2.5; myInt = (int)myFloat; cout << myFloat << " " << myInt << endl; myFloat = 2.1; myInt = (int)myFloat; cout << myFloat << " " << myInt << endl; myFloat = 2.9; myInt = (int)myFloat; cout << myFloat << " " << myInt << endl; cout << "Float to Integer" << endl; cout << "(Rounded)" << endl; myFloat = 2.5; myInt = (int)(myFloat + .5); cout << myFloat << " " << myInt << endl; // use the StringToNumber() function to perform the conversion. myInt = 3; myFloat = myInt; cout << myFloat << endl << endl; cout << "String to number" << endl; int x = StringToNumber("12345") * 50; cout << x << endl << endl; // use the NumberToString() function to perform the conversion. cout << "Number to string" << endl; string mystring = NumberToString(80525323); cout << mystring << endl; return 0; }