lang.cpp: In function 'void excerpt(int*)':
lang.cpp:58:13: warning: unused variable 'abc' [-Wunused-variable]
         int abc=3;
             ^~~
lang.cpp: At global scope:
lang.cpp:14:38: warning: 'right' defined but not used [-Wunused-variable]
 static int lnum, i,j,k,n,nl, uni[N], right, tot;
                                      ^~~~~
lang.cpp:14:30: warning: 'uni' defined but not used [-Wunused-variable]
 static int lnum, i,j,k,n,nl, uni[N], right, tot;
                              ^~~
lang.cpp:14:26: warning: 'nl' defined but not used [-Wunused-variable]
 static int lnum, i,j,k,n,nl, uni[N], right, tot;
                          ^~
lang.cpp:14:24: warning: 'n' defined but not used [-Wunused-variable]
 static int lnum, i,j,k,n,nl, uni[N], right, tot;
                        ^
lang.cpp:14:22: warning: 'k' defined but not used [-Wunused-variable]
 static int lnum, i,j,k,n,nl, uni[N], right, tot;
                      ^
lang.cpp:14:20: warning: 'j' defined but not used [-Wunused-variable]
 static int lnum, i,j,k,n,nl, uni[N], right, tot;
                    ^
lang.cpp:14:18: warning: 'i' defined but not used [-Wunused-variable]
 static int lnum, i,j,k,n,nl, uni[N], right, tot;
                  ^
lang.cpp:14:12: warning: 'lnum' defined but not used [-Wunused-variable]
 static int lnum, i,j,k,n,nl, uni[N], right, tot;
            ^~~~
lang.cpp:13:23: warning: 'lan' defined but not used [-Wunused-variable]
 static char lang[20], lan[100][20];
                       ^~~
lang.cpp:13:13: warning: 'lang' defined but not used [-Wunused-variable]
 static char lang[20], lan[100][20];
             ^~~~