print numbers from string in c++ | string handling in c/c++

This video will be helpful for compiling strings using control structures. Here we are going to print all numbers from the string of characters. A string variable may contain any characters. These characters include:
1. Numbers
2. Alphabets
3. Special Symbols
In some cases we use alphabets with the combination of numbers such as "registration numbers". So in that case we will fetch numbers out of the given string and print these numbers on the screen.