foo.cc: In function 'int main()':
foo.cc:5:16: warning: variable 'b' set but not used [-Wunused-but-set-variable]
    5 |  float a,x,y,z,b,c,d,e,f;
      |                ^
foo.cc:5:22: warning: unused variable 'e' [-Wunused-variable]
    5 |  float a,x,y,z,b,c,d,e,f;
      |                      ^
foo.cc:5:24: warning: unused variable 'f' [-Wunused-variable]
    5 |  float a,x,y,z,b,c,d,e,f;
      |                        ^
foo.cc:11:19: warning: 'a' is used uninitialized in this function [-Wuninitialized]
   11 |  printf("%.2lf",(a+c+d));
      |                  ~^~

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