Hi everyone, i have just startted programming with C and i have got 3 Questions:

1. How to calculate with decimal numbers in C.
2. How to convert strings into numbers and perform calculations on it.
3. Where to find a book that explains all the header files.

Tahank you very much for answering my Questions.

ps. I left PERL and started with C is it good????.

What's up, Mahen? I'm new, too. This is my first post -- hell of an introduction, huh? Let me try to answer your questions.

First off, switching from Perl to C could be good or it could be bad. I strongly recommend C++, however. Despite what people think, they're quite different [at least if you're using the many new features of the language]. But a lot depends on what you want to do.

So, in C++, you can have a string and convert it to numbers. Here's an example:

char * testString = "Hello, Mahen";
int numberofstring = 0;
while ( *testString ) //while string isn't null
{
numberofstring = static_cast< int >( *testString );
//Do what you want with the numeric value, etc.
testString++; //Move the pointer to the next character.
}

You can also use the STL string type to make it even easier, but this looks more C-esque, so I decided to use that.

Your first question I don't understand. Can you be more specific? Do you just want to do arithmetic operations on decimal numbers or something else?
Let me know.

Hi mahen,
We can calculate decimal number very easily [eg.c=a+b.]
we can operate any arithmatical operation on decimal numbers
in C.

Using atoi(a macro) we can convert a string to integer.
Syntax:
int atoi(const char *s);
Prototype:
stdlib.h

thanking you...
Rishi.