foo.c: In function 'main':
foo.c:4:42: warning: unused variable 'temp' [-Wunused-variable]
  int i,j,k,p,q,r,t,n1,n2,n3,flag,count=0,temp;
                                          ^~~~
foo.c:4:16: warning: unused variable 'r' [-Wunused-variable]
  int i,j,k,p,q,r,t,n1,n2,n3,flag,count=0,temp;
                ^
foo.c:4:14: warning: unused variable 'q' [-Wunused-variable]
  int i,j,k,p,q,r,t,n1,n2,n3,flag,count=0,temp;
              ^