/in/foo.c: In function 'shu':
/in/foo.c:25:13: warning: unused variable 'sumf' [-Wunused-variable]
  int sumz=0,sumf=0;
             ^~~~
/in/foo.c:25:6: warning: unused variable 'sumz' [-Wunused-variable]
  int sumz=0,sumf=0;
      ^~~~
/in/foo.c: In function 'main':
/in/foo.c:93:19: warning: 'x' is used uninitialized in this function [-Wuninitialized]
     printf("%d\n",heng(x,y,a,N,M)+shu(x,y,a,N,M)+pie(x,y,a,N,M)+na(x,y,a,N,M));
                   ^~~~~~~~~~~~~~~
/in/foo.c:93:19: warning: 'y' is used uninitialized in this function [-Wuninitialized]