How do we give decimal inputs and outputs in C++

Answer 1

by working with floats or typecasting float and using the print specifier %f printf("%f",float_num)

Answer 2

float f;
cin >> f;
cout << f;

https://www.sololearn.com/learn/CPlusPlus/1607/

Answer 3

You can use float or double data type
double deci=5.678
std::cout<<deci;