/in/foo.cc: In function 'int main()':
/in/foo.cc:39:32: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
     while (missile[++n] = read()); n--;
                                ^
/in/foo.cc:39:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
     while (missile[++n] = read()); n--;
     ^~~~~
/in/foo.cc:39:36: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
     while (missile[++n] = read()); n--;
                                    ^