foo.cc: In function ‘int main()’:
foo.cc:33:7: warning: right operand of comma operator has no effect [-Wunused-value]
   33 | b1++,s;
      |       ^
foo.cc:51:8: warning: right operand of comma operator has no effect [-Wunused-value]
   51 | b1++,s1;
      |        ^
foo.cc:7:14: warning: unused variable ‘x’ [-Wunused-variable]
    7 | int n1,n2,n3,x=0,y=0,n;
      |              ^
foo.cc:7:18: warning: unused variable ‘y’ [-Wunused-variable]
    7 | int n1,n2,n3,x=0,y=0,n;
      |                  ^
foo.cc:7:22: warning: unused variable ‘n’ [-Wunused-variable]
    7 | int n1,n2,n3,x=0,y=0,n;
      |                      ^