--- a/c/bitVector/main.cc	Mon May 25 20:46:26 2015 +0900
+++ b/c/bitVector/main.cc	Tue May 26 00:54:52 2015 +0900
@@ -2,32 +2,32 @@
 #include <stdlib.h>
 #include <string.h>
 
-unsigned long bitContainer = 0x0000000000000000;
-unsigned long bitMask = 0xFFFFFFFFFFFFFFFF;
+unsigned long bitSet(int bitSetPosition, unsigned long bitContainer) {
+    unsigned long tmp = 1;
+    tmp = tmp << (63 - bitSetPosition);
+    bitContainer = bitContainer | tmp;
+    return bitContainer;
+}
 
-void bitSet(unsigned int bitShiftNum) {
-    bitContainer = 1 ;
-    bitContainer = bitContainer << (63 - bitShiftNum);
-
+void bitGet(unsigned long bitContainer) {
     for (int i = 63; i >= 0; i--) {
         printf( "%lu", ( bitContainer >> i ) & 1 );
     }
     puts("");
 }
 
-void bitGet() {
-
-}
-
 int main(int argc, char **argv) {
 
-    unsigned int bitShiftNum = 0;
+    int bitSetPosition = 0;
+    unsigned long bitContainer = 0;
+
     for (int i = 1; i < argc ; i++) {
         if (strcmp(argv[i],"-n") == 0) {
-            bitShiftNum = atoi(argv[i+1]);
+            bitSetPosition = atoi(argv[i+1]);
         }
     }
 
-    bitSet(bitShiftNum);
+    bitContainer = bitSet(bitSetPosition,bitContainer);
+    bitGet(bitContainer);
     return 0;
 }