/in/foo.cc: In function 'int main()':
/in/foo.cc:19:8: warning: variable 'h' set but not used [-Wunused-but-set-variable]
    int h,i,j,n,t,a[10][10];
        ^
/in/foo.cc:19:16: warning: unused variable 't' [-Wunused-variable]
    int h,i,j,n,t,a[10][10];
                ^