Thread: a #define problem

Code:

#define tip(expr) printf(#expr"=%f\n",expr)

if i make a tip(a+b) it prints some random number... how can i make it work?

thank you!

your double quote is in the wrong place that's one thing, and your also missing a semicolon . what it should be given below

Code:

#define tip(expr) printf("#expr=%f\n",expr);

i hope that's what you asked for

post your code because it works for me.

Code:

#define tip(expr) printf(#expr"=%f\n",expr)
#include<stdio.h>

int main()
{
        tip(1+4);
        return 0;
}

Code:

root@pamblica:~/prog# gcc -o test test.c
root@pamblica:~/prog# ./test
1+4=-0.073272
root@pamblica:~/prog# ./test
1+4=-0.146464
root@pamblica:~/prog# ./test
1+4=-0.225375

instead of tip(1+4); use tip(1.0+4.0);

yes... thanks a lot!