CODEWITHSUNDEEP
cconcatenationmicrocontroller
ramsesrr
ramsesrr

Reputation: 15

Concatenation using ## for one string and an integer value in C for microcontroller

I need to concatenate a string with an integer.I'm using this code :

#include<stdio.h>
#define SW_ENUM_VALID_COUNT(x) SW##x##_VALID_COUNT

void main()
{
      int b = 16;
      int SW16_VALID_COUNT=8;
       printf("%d",SW_ENUM_VALID_COUNT(b));
}

What should I do in order to have the result of the expression SW_ENUM_VALID_COUNT(b) <=> SW16_VALID_COUNT because now the result is SWb_VALID_COUNT .

Upvotes: 1

Views: 156

Answers (1)

unwind
unwind

Reputation: 399803

You can't do this.

The value of a variable (such as b in your code) is not available to the preprocessor.

Upvotes: 4

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