You should use all MIPS conventions with regard to parameter passing and the saving and restoring of registers.
Write a program that parses simple assignment statements, and checksfor syntax errors. Each statement will be of the form: "variable = arithmetic expression;" where the arithmetic expression is composed of constants (0,1,2 ... 9), variables (A, B, .. Z) and binary arithmetic operators (+, -, *, /). No two variables or constants may appear together without an intervening operator; and no two operators may appear without an intervening constant or variable. The final symbol must be a semicolon, preceeded by either a variable or a constant. The statement must contain exactly one = sign, a single variable precedes the = sign, and a variable or constant must immediately follow it.
Your program should read in statements and state whether or not each is valid. If there is an error, it should state what the error is in detail. You need not mention all the errors if there are more than one, just the first one you find. It should keep reading statements until a $ is read. You may assume that no statement has more than 40 characters.
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