foo.c: In function 'main':
foo.c:172:9: warning: 'weizhishu' may be used uninitialized in this function [-Wmaybe-uninitialized]
  172 |         printf("%c=",weizhishu);
      |         ^~~~~~~~~~~~~~~~~~~~~~~
foo.c:128:43: warning: 'denghao' may be used uninitialized in this function [-Wmaybe-uninitialized]
  128 |                                         if(i<denghao)
      |                                           ^

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