double in cpp

Question

https://code.sololearn.com/coaM9cpWltrq/?ref=app

Why ìn cpp:
double b=9/7;
//its always 1;
cout<<b;

But
double b=9;
//its accurate 1.28571428
cout<<b/7;
Both are DOUBLE

With Respect

Answer 1

‎میم شین‎

9 and 7 are int not double.

You need to cast one of them with double to get in decimal:

double b = (double) 9 / 7;

In second case b is double so 9 will be treated as double.

Answer 2

You could also use double b = 9.0/7.0;

Answer 3

Thx Mr. A͢J - S͟o͟l͟o͟H͟e͟l͟p͟e͟r͟

Answer 4

‎میم شین‎

In Java too you will get same result but 1.0 instead of 1

Answer 5

You could also use
double b = 9.0/7;
or
double b = 9/7.0;

Answer 6

Because division of two integers is always an integer even if you declare it as double or float.

Answer 7

Use this instead, double = 9.0 / 7.0