题目内容

请阅读下面的程序，在空白处填写正确的代码，该程序的功能是：根据对x的输入，求1到x的累加和。int fun(int n){int i,c;c=0;for (i=1;i<=n;i++)c=c+i;_}void main(){int x;scanf("%d", _);printf("%d\n",fun(x));}

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