/in/foo.c: In function 'main':
/in/foo.c:5:16: warning: unused variable 'b' [-Wunused-variable]
     int a[101],b[100];
                ^
/in/foo.c:5:9: warning: unused variable 'a' [-Wunused-variable]
     int a[101],b[100];
         ^
/in/foo.c:4:33: warning: unused variable 'break1' [-Wunused-variable]
     int x,y,i,j,node=0,nodestop,break1=0;
                                 ^~~~~~
/in/foo.c:4:24: warning: unused variable 'nodestop' [-Wunused-variable]
     int x,y,i,j,node=0,nodestop,break1=0;
                        ^~~~~~~~
/in/foo.c:4:17: warning: unused variable 'node' [-Wunused-variable]
     int x,y,i,j,node=0,nodestop,break1=0;
                 ^~~~
/in/foo.c:4:15: warning: unused variable 'j' [-Wunused-variable]
     int x,y,i,j,node=0,nodestop,break1=0;
               ^
/in/foo.c:4:13: warning: unused variable 'i' [-Wunused-variable]
     int x,y,i,j,node=0,nodestop,break1=0;
             ^