Thread: syntax error before '=' token

Help! I don't know what's wrong...
It keeps giving error message

syntax error before '=' token

But I'm sure nothing is wrong...

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define PI=3.14

int main(void)
{
    double vol,area,r,h;
    
    printf("radius is : ");
    scanf("%lf",&r);
    printf("height is : ");
    scanf("%lf",&h);
    
    vol=PI*r*r*h;
    area=2*PI*r*r+2*PI*r*h;
    
    printf("volume is: %g and area is: %g\n", vol,area);
    
    getch();
    return 0;
    }

Originally Posted by vsovereign

Help! I don't know what's wrong...
It keeps giving error message

But I'm sure nothing is wrong...

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define PI=3.14

int main(void)
{
    double vol,area,r,h;
    
    printf("radius is : ");
    scanf("%lf",&r);
    printf("height is : ");
    scanf("%lf",&h);
    
    vol=PI*r*r*h;
    area=2*PI*r*r+2*PI*r*h;
    
    printf("volume is: %g and area is: %g\n", vol,area);
    
    getch();
    return 0;
    }

Remember, macro expansion is literal, so everywhere in you program that the expression "PI" appears is substituted with "=3.14".

thank you!