What is scanf reading?
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What is scanf reading?
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This design considers any symbol from the inlet flow and does not retain it. I mean, it's a way to miss one symbol.
For example, we read every second symbol:
#include <stdio.h>int main() {
char c;
while (scanf("%*c%c", &c) == 1) {
putc(c, stdout);
}
}
$ gcc scanf_c.c$ echo "Hello, world!" | ./a.out
e_l,w_r_d$ echo " Hello, world!" | ./a.out
H_l_o o_l!
$
P.S. I sent the answer because I erroneously wrote that
%*cpasses underwear symbols. That's not true. In order to pass the gaps in the format, a gap must be clearly inserted:#include <stdio.h>int main() {
char c;
while (scanf(" %*c%c", &c) == 1) {
printf("_%c", c);
}
}
$ gcc scanf_c_skipws.c$ echo "Hello, world!" | ./a.out
e_l,o_l!
$ echo " Hello, world!" | ./a.out
e_l,o_l!
$ echo " Hello, world!" | ./a.out
e_l,o_l!
$
P.P.S. Thank you. https://ru.stackoverflow.com/users/232/avp For comment.
