/in/foo.c: In function 'main':
/in/foo.c:5:44: warning: unused variable 't' [-Wunused-variable]
 {int a[1000]={1,0},n,fac[1000]={0},p,i,j,k,t,left;
                                            ^
/in/foo.c:5:36: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
 {int a[1000]={1,0},n,fac[1000]={0},p,i,j,k,t,left;
                                    ^