C2065 Undeclared Identifier Error

This is a discussion on C2065 Undeclared Identifier Error within the C Programming forums, part of the General Programming Boards category; I can't seem to figure out why I am get the error 2065: Undeclared identifier for 'PowerValue' and C2143:Syntax Error ...

  1. #1
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    C2065 Undeclared Identifier Error

    I can't seem to figure out why I am get the error 2065: Undeclared identifier for 'PowerValue' and C2143:Syntax Error : Missing ';' before 'type' on line 13.
    Code:
    #include <stdio.h>
    #include <stdlib.h>
    
    
    void main ()
    {
    	int NumbertoMultiply;
    	int X; /*Answer after the number get multiplies a number by a factor 2 to the power n*/
    	printf("Please enter the number to multiply: ");
    	scanf_s("%d",NumbertoMultiply);
    
    
    	int PowerValue;
    	printf("Please enter the number for the power: ");
    	scanf_s("%d",PowerValue);
    
    
    	X = (NumbertoMultiply << PowerValue);
    
    
    	printf("Here is the value of X which was multiplied by your given number by a factor 2 to the power: %d",X);
    	
    
    
    }

  2. #2
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    Assuming this is C and not C++, all of your variables need to be declared at the start of the function, so move int PowerValue; before or after the int X; .

  3. #3
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    So I moved the int Powervalue; before int X;. I am getting new warnings i.e. C4700: Uninitialzied local variable 'PowerValue' Used and also get same error for 'NumbertoMultiply'

  4. #4
    C++ Witch laserlight's Avatar
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    That is because you forgot to pass a pointer to scanf_s on both occasions.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  5. #5
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    Thank you! Laserlight

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