/in/foo.cc: In function 'int main()':
/in/foo.cc:23:15: warning: unused variable 'm' [-Wunused-variable]
     int i,j,k,m,n,p,q,x,y,z,a,b,c,d;
               ^
/in/foo.cc:23:17: warning: unused variable 'n' [-Wunused-variable]
     int i,j,k,m,n,p,q,x,y,z,a,b,c,d;
                 ^
/in/foo.cc:23:19: warning: unused variable 'p' [-Wunused-variable]
     int i,j,k,m,n,p,q,x,y,z,a,b,c,d;
                   ^
/in/foo.cc:23:21: warning: unused variable 'q' [-Wunused-variable]
     int i,j,k,m,n,p,q,x,y,z,a,b,c,d;
                     ^
/in/foo.cc:23:23: warning: unused variable 'x' [-Wunused-variable]
     int i,j,k,m,n,p,q,x,y,z,a,b,c,d;
                       ^
/in/foo.cc:23:25: warning: unused variable 'y' [-Wunused-variable]
     int i,j,k,m,n,p,q,x,y,z,a,b,c,d;
                         ^
/in/foo.cc:23:27: warning: unused variable 'z' [-Wunused-variable]
     int i,j,k,m,n,p,q,x,y,z,a,b,c,d;
                           ^