Explain output of this C program

Question

Found this code at C Puzzles.

#include

int main()
{
  int a=1;
  switch(a)
  {   int b=20;
      case 1: printf(\"b is %d\\n\",b);
                       


        

Answer 1

Inside switch statement nothing will be accepted like assigning values to the variable and printing except inside case. if you want the b value assign it outside the switch . Also b value should be like garbage value it can't change until assign some values to the particular location.