0_0_23793353_28860.c: In function 'main':
0_0_23793353_28860.c:4:19: error: 'sum' undeclared (first use in this function)
printf("%d\n\n",sum);
^
0_0_23793353_28860.c:4:19: note: each undeclared identifier is reported only once for each function it appears in
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