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int: decimal or hexadecimal, signed -
float: only dot form -
char: normal character or hex-form character -
struct -
pointer:
int *float *``char *&for addressing,*for address resolution
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if,else ifelse -
while -
for -
break,continue
- single line comment:
// - multiple line comment:
/* */
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#include
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Lexical error (error type A) when there are undefined characters or tokens in the SPL program, or identifiers starting with digits.
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Syntax error (error type B) when the program has an illegal structure, such as missing closing symbol. Please find as many syntax errors as possible.
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Type 1 a variable is used without a definition
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Type 2 a function is invoked without a definition
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Type 3 a variable is redefined in the same scope
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Type 4 a function is redefined (in the global scope, since we don’t have nested functions)
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Type 5 unmatching types appear at both sides of the assignment operator (=)
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Type 6 rvalue appears on the left-hand side of the assignment operator
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Type 7 unmatching operands, such as adding an integer to a structure variable
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Type 8 a function’s return value type mismatches the declared type
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Type 9 a function’s arguments mismatch the declared parameters (either types or numbers, or both)
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Type 10 applying indexing operator ([...]) on non-array type variables
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Type 11 applying function invocation operator (foo(...)) on non-function names
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Type 12 array indexing with a non-integer type expression
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Type 13 accessing members of a non-structure variable (i.e., misuse the dot operator)
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Type 14 accessing an undefined structure member
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Type 15 redefine the same structure type
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break or continue statement not within loop
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dereference of a non-pointer
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32-bit signed integer overflow
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hex char literal overflow
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non-boolean expression at the conditional statement
- forced type conversion
- return type guess of an undefined function