[Compiler] Identify phase of error

Question

int a = b+*/c;

Which phase will give the error?Lexical or syntax?

Comments

Should be syntax error because with arithmetic operators * and / requires two operands, whereas * has none and / has one.

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http://space.wccnet.edu/~pmillis/cps120/cps120_pgm_syntax.pdf

https://web.stanford.edu/class/archive/cs/cs143/cs143.1112/materials/lectures/lecture06.pdf

syntax error

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it is not lexical error or not even semantic error

https://stackoverflow.com/questions/2816238/semantic-errors

https://www.inf.unibz.it/~calvanese/teaching/ip/lecture-notes/uni10/node4.html

https://wci.llnl.gov/codes/basis/manual/node53.html

Answer 1

Syntax error

1)Lexical Error

• It takes raw input which is a stream of characters and converts it into a stream of tokens which are logical units each representing one or more characters that b elong together

Typically  

Keywords; Examples-for, while, if etc.
Identifier; Examples-Variable name, function name etc.
Operators; Examples '+', '++', '-' etc.
Separators; Examples ',' ';' etc

identifier=letter$\left ( letter+digit \right )^{*}$

float=$digit^{+}.digit^{*}+.digit^{+}$

Here it's able to generate token so there is  No lexical error

• total number of token =9

2)Syntax errors occur during the parsing of input code, and are caused by grammatically incorrect statements. Typical errors might be an illegal character in the input, a missing operator, two operators in a row, two statements on the same line with no intervening semicolon, unbalanced parentheses, a misplaced reserved word, etc. 

3)Semantic errors occur during the execution of the code, after it has been parsed as grammatically correct. These have to do not with how statements are constructed, but with what they mean. Such things as incorrect variable types or sizes, nonexistent variables, subscripts out of range, and the like, are semantic errors.

http://infolab.stanford.edu/~ullman/dragon/slides1.pdf