foo.cc: In function 'int main()':
foo.cc:8:11: warning: 'xmin' is used uninitialized [-Wuninitialized]
    8 | while(xmin<=xmax)
      |       ~~~~^~~~~~
foo.cc:5:5: note: 'xmin' was declared here
    5 | int xmin,xmax,x=0,a;
      |     ^~~~
foo.cc:8:11: warning: 'xmax' is used uninitialized [-Wuninitialized]
    8 | while(xmin<=xmax)
      |       ~~~~^~~~~~
foo.cc:5:10: note: 'xmax' was declared here
    5 | int xmin,xmax,x=0,a;
      |          ^~~~

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