View Compilation Error

0_0_23908486_6074.cpp: In function 'int main()':
0_0_23908486_6074.cpp:5:43: error: label 'w' used but not defined
  while(scanf("%d%d%d",&a,&w,&z)!=EOF&&a,&&w,&&z)
                                           ^
0_0_23908486_6074.cpp:5:47: error: label 'z' used but not defined
  while(scanf("%d%d%d",&a,&w,&z)!=EOF&&a,&&w,&&z)
                                               ^