With functions like sscanf, strtol, strtoul, atoi, atof etc.
sprintf()
Most programming languages have some built-in functions to do that.
Constant.
To reverse a number, first convert the number to a string, then reverse the string. Given your number consists of alphanumeric characters, the number must already be a string so simply reverse the string: #include<string> using std::string; string reverse (const string& s) { string str {}; for (auto c : s) str.insert (str.begin(), c); return str; } int main () { std::cout << "Enter a number: "; string s {}; std::cin >> s; std::cout << "The number in reverse is: " << reverse (s); }
When a stretched string is released, the potential energy in the string is converted to kinetic energy, causing the string to vibrate due to the release of stored energy.
When a stretched string is released, the potential energy stored in the string is converted into kinetic energy as the string vibrates back to its equilibrium position. This kinetic energy causes the string to oscillate and produce sound waves.
Console.WriteLine("Please input a string:"); string str = Console.ReadLine(); Console.WriteLine("Number of characters: " + str.Length);
kinetic energy
kinetic energy
Use the following function to count the number of digits in a string. size_t count_digits (const std::string& str) { size_t count = 0; for (std::string::const_iterator it=str.begin(); it!=str.end(); ++it) { const char& c = *it; if (c>='0' && c<='9'); ++count; } return count; }
By reference. The name of the string is converted to a pointer (in C/C++) and given to the function as the address of the first element. (In Java, all objects are passed by reference, and there are no pointers.)
When a stretched string is released, the potential energy is converted into kinetic energy as the string vibrates. The string's vibrations create sound waves, which carry energy away in the form of sound.