Create clearbit.c

clearbit.c

@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <limits.h>
+/*
+ * Print the bits in n in four formats:
+ *
+ * hexadecimal
+ * decimal with bits interpreted as signed int
+ * decimal with bits interpreted as unsigned int.
+ * binary
+ */
+void print_bits(int n)
+{
+    // print the integer in different format
+    printf("hex:%08X signed:%d unsigned:%u bits:", n, n, n);
+
+    // a loop to print bits from most significant to least significant
+    // also an example of sizeof use
+    for (int i = sizeof(int) * 8 - 1; i >= 0; i --)
+       printf("%d", (n >> i) & 1);
+    printf("\n");
+}
+
+int main()
+{
+    int n = INT_MAX, pos;
+
+    print_bits(n);
+
+    // Repeatedly read an integer 'pos' from standard input
+    // and clear the bit at position 'pos' if successful.
+    // To exit, press Ctrl-D or Ctr-C
+
+    while (scanf("%d", &pos) == 1) {
+        // Your code to clear the bit indicated by pos
+        // TODO
+         n = ~(1 << pos)&n;
+
+        // call function to pr int the bits in n
+        print_bits(n);
+    }
+
+    /* Let the OS know everything is just peachy. */
+    return 0;
+}