finish quize 2-3

lab2/datalab-handout/bits.c

@@ -159,8 +159,9 @@ int bitXor(int x, int y) {
  *   Rating: 1
  */
 int tmin(void) {
-
-  return 2;
+  int one = 1;
+  int res = one << 31;
+  return res;
 
 }
 //2
@@ -172,7 +173,10 @@ int tmin(void) {
  *   Rating: 1
  */
 int isTmax(int x) {
-  return 2;
+  int xplusone = x + 1;
+  int all1 = xplusone ^ x;
+  int allzero = all1 + 1;
+  return !allzero;
 }
 /* 
  * allOddBits - return 1 if all odd-numbered bits in word set to 1