Can you use the #define preprocessor to convert any value stored in a variable to string?

Question

I came across the method of using #define preprocessor to convert any value to string in the following way...

#define TO_STR(x) #x
int main(){
printf("%s", TO_STR( 123 ))
}
Output: 123
I want to know if we can use the same method to convert a variable to a string...

Answer 1

Hi. Actually you cannot. Marcoses are used to modify source code before compiling, not in run time. If you try to pass a variable macros get it's name. You can use atoi function for this purpose.