foo.cc: In function 'int main()':
foo.cc:23:6: warning: iteration 9 invokes undefined behavior [-Waggressive-loop-optimizations]
   23 |  a[i]=Qiushu(i,xmin,xmax);
      |  ~~~~^~~~~~~~~~~~~~~~~~~~
foo.cc:22:14: note: within this loop
   22 | for(int i=0;i<10;i++)
      |             ~^~~
foo.cc:26:8: warning: iteration 9 invokes undefined behavior [-Waggressive-loop-optimizations]
   26 |  if(a[i]>k){
      |     ~~~^
foo.cc:25:14: note: within this loop
   25 | for(int i=0;i<=9;i++)
      |             ~^~~

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