/in/foo.cc: In function 'void px()':
/in/foo.cc:10:6: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
      for(j=i+1;j<=m;j++)
      ^~~
/in/foo.cc:13:4: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
    t=st[i]; st[i]=st[min]; st[min]=t;
    ^