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Formatted I/P functions: These functions allow us to supply the input in a fixed format and let us obtain the output in the specified form. Formatted output converts the internal binary representation of the data to ASCII characters which are written to the output file. Formatted input reads characters from the input file and converts them to internal form.

Format specifications

Data type

Integer

short signed

short unsigned

long signed

long unsigned

unsigned hexadecimal

unsigned octal

%d or %l

%u

%ld

%lu

%x

%o

Real

float

double

%f

%lf

Character

signed character

unsigned character

%c

%c

String

%s

Unformatted I/O functions: There are several standard library functions available under this category-those that can deal with a string of characters. Unformatted Input/Output is the most basic form of input/output. Unformatted input/output transfers the internal binary representation of the data directly between memory and the file

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Q: Q2 Differentiate between formatted and unformatted you input and output functions?
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