[Dev-C++] help

hi....i really need help .....i have an assighnment in c++ ;
 
the professor wants me to write a program which counts the symbols of a string.... here is the question....
 
 
 
 A string is any combination of blanks, letters, digits and/or special characters.
 
Write a C++  program to calculate and print the number of different symbols used in a given string. A blank space counts as one symbol.
 
Input: Any string. The length is limited to 60 characters. For example:
 
Enter a string: Mississipi
 
Test data:#1. “Say good bye!”#2. “The world is round”
 
Output: The number of different symbols. For example, the output for the string “Mississipi” is 
 
Number of symbols for the string “Mississippi” is: 4
 
 
 
 
 
THIS IS THE QUESTION ...SOO PLZZZZZ IF ANYYONE HERE KNOWS THE ANSWER JUST MSG IT TO ME .....AND HERE IS MY HOTMAIL ADDRES..U CAN SEND  THE PROGRAM TO ME ..SOU...@HO...   
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