Iosfixed forces all numbers placed on the cout stream

ios::fixed, forces all numbers placed on the cout
stream to be placed in conventional decimal
point notation

ios::showpoint, tells the stream always to
display a decimal point

setprecision ( ), manipulator tells the stream
always display the specified decimal values
after decimal point.

Void Functions

There are functions that are not part of any statement and do
not return any value. For example

void main (void)
This function does not accept and arguments nor return
any value.

void funct1 (int , int)
This function accepts two integer values but does not
return any value.

float funct2 (void)
This function does not accept any arguments but it returns
a floating point value.