reading unknown number of integers from stdin (C)

Question

I need to read an input file like :

1
19 20 41 23
2
41 52 43
3
90 91 941
4
512
5

6
51 61

Each odd line is an integer. Each even line is unknown number of integers.

It is very easy in C++

while( cin >> k ){
............
}

I'm not so used to C, so I couldnt make it in C. Any ways to do it?

Answer 1

Running your input file through:

#include <stdio.h>

int main() {
        int k;
        while (scanf("%d", &k) == 1) {
                printf("read number: %d
", k);
        }
        return 0;
}

Results in:

read number: 1
read number: 19
read number: 20
read number: 41
read number: 23
read number: 2
read number: 41
read number: 52
read number: 43
read number: 3
read number: 90
read number: 91
read number: 941
read number: 4
read number: 512
read number: 5
read number: 6
read number: 51
read number: 61

This is the C analog of the code you reference in your original question.