testcase5.txt

_main[]
	int a,b;
	a = 3;
	b = 5;
	function [int sum, int diff, int prod]= _calculator[int c, int d]
		sum = c + d;
		diff = c*d;
		diff = c - d;
	end;
	
	#computes the sum of squares of a, b and c 
	function [int x] = _sumOfSquares[int a, int b, int c] 
	    int p,q,r; 

	    function [int s] = _square[int u] 
	         s = u*u; 
	    end; 
	    #function _square end here

	    function [real u] = _anotherFunction[int d]
	    	u = p + q + r ;
            end;
	    # function _anotherFunction ends here

	    p = _square(a); 
	    q = _square(b); 
            r = _square(c); 
	    x = _anotherFunction(2,3); 
	end;
	#function _sumOfSquares ends here
	int  p;
	real d;
	[s, d, p] = _calculator(23,10.23);
	p = _sumOfSquares(1,2,3);
	d = _sumOfSquares(4,5,6);
end

#Semantic errors
# line 9: output parameter prod is not assigned any value throuout the function definition (equivalent to return in C)
# Line 21 does not have any error as variables p,q,r are visible in the scope of function _anotherFunction
# line 28: number of input parameters in function call to function _anotherFunction does not match with the number of formal input parameters 
# line 31: No redeclaration of variable p hence no semantic error
# line 33: variable s not declared
# line 33: type of actual and formal input parameters do not match
# line 35: type mismatch