foo.c: In function 'main':
foo.c:9:5: warning: 'he' is used uninitialized [-Wuninitialized]
    9 |     printf("斐波那契数列前%d位的和为%d\n",n,he);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.c:5:15: note: 'he' was declared here
    5 |         int n,he;
      |               ^~

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