why there is any need for cout.put()?
much of the answer is historical.Before release 2.0 of c++ .cout would display character variables as characrers but display character constans.such as 'M' and 'N' as numbers.the problem was that earlier versions of c++，like C stored character constans as int .That is , the
the code 77 for 'M' would be stored in a 16-bit or 32-bit unit .meanwhile char variables typically occupied 8 bits a statement like the following copied 8 bits (the important 8 ) from the constant 'M' to the varable ch .
char ch = 'M'
unfortunates this mean that.to cout 'M' and ch looked quite different from one another.even though both held the same value.so a statement like the following wolud print the $ character rather than the simple display $
cout<<'$'
but the following would print the character as designed cout.put('$');
now after release 2.0 c++ stores single character constants as type char not type int therefore cout now correctly handles characters constants.
summary:
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