foo.c:10:3: warning: useless storage class specifier in empty declaration
   10 |   };
      |   ^
foo.c: In function 'chushi':
foo.c:18:10: warning: unused variable 'count_value' [-Wunused-variable]
   18 |      int count_value = 0;    //统计矩阵中元素数值不为零的元素的总和
      |          ^~~~~~~~~~~
foo.c: In function 'showjuzhen_2':
foo.c:63: error: expected '{' at end of input

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