运行 ID: 75551

Main.cc: In function ‘int main()’:
Main.cc:8:11: error: ‘sqrt’ was not declared in this scope
     w=1.0*sqrt(1.0*x);
           ^~~~
Main.cc:8:11: note: suggested alternative: ‘qsort’
     w=1.0*sqrt(1.0*x);
           ^~~~
           qsort