I was trying nested switch but after choosing ice cream the scanf is not asking input.

Question

//I did try without scanf() and it worked but why scanf() not working

//here's the code

#include <stdio.h>  
int main () {  
  
   char i,j;
   printf("Enter a for za\nEnter b for ice cream\n ");
   scanf("%c",&i);
   
   switch(i) {  
     
      case 'a':   
         printf("You ordered veggie pizza\n");break;
      case 'b':
      {
                printf("Enter c for choco\nEnter v for vanilla\n");
                scanf("%c",&j);
                 switch(j) {  
                     case 'c':  
                     printf("You ordered choco yumyum\n");break;
                 case 'v':
                  printf("You ordered plain vanilla\n ");break;
         }  
      }
      break;
      default: printf("invisible food\n"); break;    
   }  
     
  
   return 0;  
}

Answer 1

After you input 'b' the standard input also has the newline character. The next time you scan for a character, it's automatically taken from the standard input. If you want to ignore these whitespace characters, add a space before your character token in your format string (everywhere). E.g.:

scanf(" %c", &i);
// ...
scanf(" %c", &j);