foo.cc: In function 'int main()':
foo.cc:6:6: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
    6 |  if(a>2000&a==2000)printf("%.2f",0.8*a);
      |     ~^~~~~
foo.cc:7:12: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
    7 |   else if(a>1500&a==1500)printf("%.2f",0.85*a);
      |           ~^~~~~
foo.cc:8:13: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
    8 |    else if(a>1000&a==1000)printf("%.2f",0.9*a);
      |            ~^~~~~
foo.cc:9:14: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
    9 |     else if(a>500&a==500)printf("%.2f",0.95*a);
      |             ~^~~~

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