/*int    i, j, k;
char   c, ch;
float  f, salary;
double d;*/

			#include <stdio.h>

// Variable declaration:
extern int a, b;
extern int c;
extern float f;

int main () {

   /* variable definition: */
   int a, b;
   int c;
   float f;
 
   /* actual initialization */
   a = 10;
   b = 20;
  
   c = a + b;
   printf("value of c : %d 
", c);

   f = 70.0/3.0;
   printf("value of f : %f 
", f);
 
   return 0;
}

/*value of c : 30 
value of f : 23.333334*/