This code in C will read integers until you type Control-Z (end of entry in windows).
void main(int argc, char *argv[]) {
char line[100];
int sum = 0;
while(scanf("%s", line) == 1) {
sum += atoi(line);
}
printf("%d\n", sum);
}
How do I do the same using Scanner in Java?
One possible solution would look like this:
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
int sum = 0;
while (s.hasNextLine()) {
String nextLine = s.nextLine();
sum += Integer.parseInt(nextLine);
}
System.out.println(sum);
}
}
You can use the class documentation to understand the methods it has: < strong> Scanner .
Here is a simple example (not tested):
import java.util.Scanner;
public class SimpleScanner {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
int sum = 0;
while (s.hasNextInt()) {
sum += s.nextInt();
}
System.out.println(sum);
}
}
The loop would be equivalent to the following in C ++:
int i;
while (cin >> i) {
sum += i;
}