How do you get input for an arithmetic operator in c?

Answer 1

Arithmetic operators take two inputs, one on either side of the operator. For instance, to add two numbers, say 2 and 5, either of the following expressions will work:

2+5

5+2

The result from this expression is "7", which must be used either in a function or variable assignment as follows:

int i=2+5;

This will not only declare variable "i", but initialize it to a value of "7".

For getting input from the user that can be used with arithmetic operators, the method will depend upon the interface you're using. If you're writing a console (text-only) application, scanf() and atoi() will work nicely:

int main()

{

int num1, num2;

printf("Enter the first number: ");

scanf("%d", num1);

printf("Enter the second number: ");

scanf("%d", num2);

printf("%d + %d = %d\n", num1, num2, num1+num2);

return 0;

}

Here, scanf() is used to read input from the user into two numbers. Then those two numbers are printed as well as the result of adding both of them.

See the related link below for more information on scanf() to read user input. If you're writing a graphical application, look on the Web for tutorials for the compiler (and supporting library) you're using to write your program.