foo.c: In function ‘main’:
foo.c:14:26: warning: ‘m’ may be used uninitialized [-Wmaybe-uninitialized]
   14 |                         m+=1;
      |                         ~^~~
foo.c:5:19: note: ‘m’ was declared here
    5 |     int a,n=0,i,j,m,total;
      |                   ^