Type checking is the processes of identifying errors in a program based on explicitly or implicitly stated type information. In the third project, you need to implement a type checker for your C subset. The checker needs to - Create a symbol table - Insert the type of each variable into the symbol table - Perform the type checking for each expression The basic type checking rules are summarized as follows. You can add your rules for your C subset (1) Each variable must be declared before it is used (2) Each identifier can be only declared once (3) The types of the operands of an operator must be the same (4) The types of the two sides of an assignment must be the same The type checker needs to report an error message for each type error detected Each type error message should contain the line number where the error is detected and an explanation of the error. The format for printing a type error message is as follows: "Type Error:" line number ":" the error message. For a sample C program given as follows 1. void main () int num; int s int index; float S; num - index 3.21; The type checker will report the following error messages Type checking is the processes of identifying errors in a program based on explicitly or implicitly stated type information. In the third project, you need to implement a type checker for your C subset. The checker needs to - Create a symbol table - Insert the type of each variable into the symbol table - Perform the type checking for each expression The basic type checking rules are summarized as follows. You can add your rules for your C subset (1) Each variable must be declared before it is used (2) Each identifier can be only declared once (3) The types of the operands of an operator must be the same (4) The types of the two sides of an assignment must be the same The type checker needs to report an error message for each type error detected Each type error message should contain the line number where the error is detected and an explanation of the error. The format for printing a type error message is as follows: "Type Error:" line number ":" the error message. For a sample C program given as follows 1. void main () int num; int s int index; float S; num - index 3.21; The type checker will report the following error messages