init commit

3sem/cnts/contest11/03.c

@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+enum
+{
+    MAX_LEN = 8
+};
+
+void
+process_line(int line_number)
+{
+    char buffer[MAX_LEN + 1] = {0};
+    read(0, buffer, sizeof(buffer) - 1);
+    long long number = strtoll(buffer, NULL, 10);
+    long long square = number * number;
+    printf("%d %lld\n", line_number, square);
+
+    return;
+}
+
+int
+main()
+{
+    pid_t pid;
+
+    for (int i = 0; i < 3; i++) {
+        if ((pid = fork()) == 0) {
+            process_line(i + 1);
+            exit(0);
+        }
+    }
+
+    while (wait(NULL) != -1)
+        ;
+
+    return 0;
+}