Checking If Statements

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 //Program for Checking Nestyed If, Else if Ladder & Conditional Statements.  
 //Downloaded from www.c4cprog.co.nr  
 #include<conio.h>  
 void main()  
 {  
      int y,x,w;  
      clrscr();  
      printf("\n\nEnter The Val of X :");  
      scanf("%d",&x);  
      clrscr();  
      printf("\nEnter Your Choice\n1.Else If Ladder\n2.Nested If\n3.Conditional Operator\n\n");  
      scanf("%d",&y);  
 switch(y)  
 {  
 case 1:  
      if(x<0)  
      printf("\ny=1");  
      else  
      if(x==0)  
      printf("\ny=0");  
      else  
      if(x>0)  
      printf("\ny=-1");  
      break;  
 case 2:  
      if(x!=0)  
      {  
      if(x>0)  
      printf("\ny=-1");  
      else  
      printf("\ny=1");  
      }  
      else  
      printf("\ny=0");  
      break;  
 case 3:  
 (x!=0)?((x<0)?(w=1):(w=-1)):(w=0);  
 printf("\ny=%d",w);  
 break;  
 default :  
 printf("\nInvalid Choice !!!\n");  
 break;  
 }  
 getch();  
 }  
 /*  
 Enter The Val Of X : 5  
 Enter Your Choice  
 1.Else If Ladder  
 2.Nested If  
 3.Conditional Operator  
 1  
 y=-1  
 0  
 y=0  
 3  
 y=-1  
 */