I am a Java programmer, but currently solving some online problems on C platform. I want to stop reading input when no input is read from console. Its like this
Input :
1
2
3
4
Output :
1
2
3
4
But in advance, I do not know how many no.s I will read. As many of you may be knowing that online judges feed input from a file. So how to stop reading data from console when no data is fed from console ?
Sorry for very stupid question.
Upon successful completion, these functions shall return the number of successfully matched and assigned input items; this number can be zero in the event of an early matching failure. If the input ends before the first matching failure or conversion, EOF shall be returned. If a read error occurs, the error indicator for the stream is set, EOF shall be returned.
#include <stdio.h>
int x;
while (scanf("%d", &x) != EOF) { ... }
while (scanf("%d", &x) == 1) /* ... */. scanf() can return 0 to indicate some error not caught with != EOF
fgets.