What is the meaning of percent a in c language?

Answer 1

This is found in the printf family of functions. The % is just a flag that says that the next character specifies a variable type.

%c character

%d signed integers

%i signed integers

%e scientific notation, with a lowercase "e"

%E scientific notation, with a uppercase "E"

%f floating point

%g use %e or %f, whichever is shorter

%G use %E or %f, whichever is shorter

%o octal

%s a string of characters

%u unsigned integer

%x unsigned hexadecimal, with lowercase letters

%X unsigned hexadecimal, with uppercase letters

%p a pointer

%n the argument shall be a pointer to an integer into which is placed the number of characters written so far

%% a '%' sign

Answer 2

The %d code is a printf format specifier that says to take the next argument and convert it into a decimal, based on an int.

for (int i = -3; i < 4; ++i) printf ("i: %d i squared: %d\n", i, i*i);

will print

i: -3 i squared: 9

i: -2 i squared: 4

i: -1 i squared: 1

i: 0 i squared: 0

i: 1 i squared: 1

i: 2 i squared: 4

i: 3 i squared: 9

on stdout.

Answer 3

The meaning of percent a in c language is that it is a float handling operator.

It prints out a float variable type into a hexadecimal number.

Answer 4

%d