/in/foo.cc: In function 'void born(int)':
/in/foo.cc:32:9: warning: unused variable 'mi' [-Wunused-variable]
  double mi(1.1);
         ^~
/in/foo.cc: In function 'void attack(int)':
/in/foo.cc:205:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    if (cross(ant[i].x,ant[i].y))
    ^~
/in/foo.cc:207:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
     if (ant[i].blood<0) mayi--;
     ^~