1 files changed, 30 insertions, 1 deletions
diff --git a/src/calculer.c b/src/calculer.c
index b1de0a4..1c78197 100644
--- a/src/calculer.c
+++ b/src/calculer.c
@@ -18,10 +18,39 @@
 #include "config.h"
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <readline/readline.h>
+
+static int lower = 0;
+static int upper = 100;
+
+/* Return a random number x such that lower <= x < upper. */
+int
+calculer_rand()
+{
+	return lower + rand()%(upper-lower);
+}
 
 int
 main(void)
 {
-	printf("%s\n", PACKAGE_STRING);
+	char prompt[31] = {0};
+	int x, y, res;
+	char *input;
+
+	while (1)
+	{
+		x = calculer_rand();
+		y = calculer_rand();
+		res = x+y;
+		sprintf(prompt, "%d + %d = ", x, y);
+		input = readline(prompt);
+
+		if (atoi(input) == res)
+			printf("RIGHT\n");
+		else
+			printf("WRONG\n");
+	}
+
 	return 0;
 }