Develop C code for parsing a mathematical expression
$30-250 USD
Paid on delivery
A mathematical expression can have variables and operators. The following conditions
are imposed on the construction of an expression.
a. Valid variable names may have at most 6 characters (Allowed characters are
lower/upper case English alphabets, underscore). Space, numbers, and
special characters are not allowed in variable names.
b. Parenthesis is not allowed in the expression.
c. +, -, / and * are the four allowed operators. All operators need two operands.
Unary operators are not allowed.
d. Spaces are allowed between variables, operators. At most 3 spaces may be
allowed.
e. Expression is evaluated from left to right.
Example
1. Valid expression: length * width – area
Variables – length, width, area
Operators: *, -
Note – Spaces are allowed between variables and operators. One space
between variables and operator in the above expression.
2. Valid expression: length*width–area+my_len
Variables – length, width, area, my_len
Operators: *, -, +
No Parenthesis is used
No Spaces used
Develop C code for parsing a mathematical expression as specified by above rules and
determine if it is a valid expression. Print a message “expression is valid” or “expression
is invalid”.
The mathematical expression may be at most 100 characters long. There may be at
most 10 variables in the expression.
If the expression is invalid, print one of the following diagnostic message when
appropriate – “invalid variable” followed by partial name of the variable which is invalid,
“excessive space” for more than 3 spaces.
Project ID: #15829874
