foo.cpp: In function 'Type io::read() [with Type = double]':
foo.cpp:38:3: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   while(ch=getc(),(ch<'0'||ch>'9'))
   ^~~~~
foo.cpp:39:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
    ;aa=ch-'0';
     ^~