Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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1a.

1B.explain the logic of why this code produces this output

 #include <stdio.h>
main( )
{int a=3,b,d=12;
 float c,f=7.2;
 b=a++ * 2;
 printf("%d %d\n",a,b);
 b=++a *2;
 printf("%d %d\n",a,b);
 c = f+d/10 ;
 f += d%8;
 printf("%f %f\n",c,f);
}
output:
4 6
5 10
8.200000 11.200000

 

1B.)explain the logic of this problem

Write the necessary preprocessor macro(s) to convert from radians to degrees.
#define PI 3.141592653589793238462643383279502884197
#define rtd(x) (180.0*(x)/PI)

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