In this project, we will work to familiarize ourselves with the tools used in this course and practice their use with a simple example. You will write a program in C called math.c that uses a combination of command line arguments, standard input and standard output to perform basic calculations with $+,-,*$ and $/.$

$($Only implement integer division for this project $[3/2==1],$ this is the default behavior of $"/"$ on integers in C$).$

Program Behavior

Program takes between $1$ and $3$ arguments

Argument $1$ is the operation $($one of $+-*$ or $/)$

Arguments $2$ and $3$ are optional $($see below$)$ and are the numeric operands

If less than $3$ arguments are provided, use scanf to query the operands from the user

DO NOT prompt the user $($there should only be one printf in your program$)$

Program calls printf to return the numeric result of the operation

ONLY the numeric result should be printed $($no extra characters$)$

Program's return code MUST match the printed value

Testing

As described in Appendix B$,$ you MUST compile your programs using the $-$O$0-$Wall $-$Werror $-$pedantic $-$std$=$c$11$ gcc options when testing.

gcc $-$O$0-$Wall $-$Werror $-$pedantic $-$std$=$c$11-$o math math.c

Examples

Addition all command line

Command

$./$math $+100101$

Output

$201$

Multiplication all command line

Command

$./$math $*2202$

Output

$404$

Subtraction one command line

Command

$./$math $-12$

Input

$10$

Output

$2$

Division no command lines

Command

$./$math $/$

Input

$8$

$2$

Output

$4$