getchar and putchar are used for the input or output only one character.
getchar()
It returns an int which is either EOF(indicating end-of-file) or the next character in the standard input stream.
putchar(c)
puts the character on the output stream.
int main()
{
int a;
a = getchar();
/* read and assign character to c */
putchar(a);
/* print c on the screen */
return 0;
}
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