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int main(void) {
	char *wsk1; 
	char *wsk2; 
	char *wsk3; 
	char *a; 
 
	wsk1=&wsk2; 
	wsk2=&wsk3; 
	wsk3=&a;
	char x = *a;
	x = **wsk3;
	x = ***wsk2;
	x = ****wsk1;
	return 0;
}
 

prog.c: In function ‘main’:
prog.c:7:6: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
  wsk1=&wsk2;
      ^
prog.c:8:6: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
  wsk2=&wsk3;
      ^
prog.c:9:6: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
  wsk3=&a;
      ^
prog.c:11:6: error: invalid type argument of unary ‘*’ (have ‘int’)
  x = **wsk3;
      ^~~~~~
prog.c:12:7: error: invalid type argument of unary ‘*’ (have ‘int’)
  x = ***wsk2;
       ^~~~~~
prog.c:13:8: error: invalid type argument of unary ‘*’ (have ‘int’)
  x = ****wsk1;
        ^~~~~~
prog.c:10:7: warning: variable ‘x’ set but not used [-Wunused-but-set-variable]
  char x = *a;
       ^

Standard output is empty