How to read in numbers as command arguments?

Question

How can make it where the program reads any two integers input before the program is run? I want the output to look like this, with x and y being any variables typed in (I am using Cygwin):

$ ./a x y

product of x and y

sum of x and y

I used int main(int argc, char *argv[]). I tried to assign argv[2] to x and argv[3] to y, but when I compile the program it says assignment makes integer from pointer without cast. What does this mean and how do I fix it?

Answer 1

Assuming the C language:

• Command line arguments are found in the argv array - argv[1], argv[2] etc.
• Converting a string argument to an integer can be done with the atoi function.
• Output can be done with the printf function.

[Trying to teach you to fish, rather than providing a fish. Good luck!]