Add bin dir

cpp/24game.cpp

@@ -0,0 +1,17 @@
+#include <iostream>
+#include <string>
+#include <ctime>
+
+//生成在[begin,end]范围内的随机数
+double randnum(int begin = 0, int end = 1){
+    srand(time(NULL));
+    return (rand()%(end-begin+1))+begin;
+}
+
+//24点主类
+class Game24{};
+
+int main(int argc, char ** argv){
+    printf("%f",randnum(1,13));
+    return 0;
+}