程序改错 题目:下列程序从键盘输入一个数 n,求1~n之和并输出。请纠正程序中存在错误,使程序实现其功能。 如输入 5↙ 输出: The sum from 1 to 5 is 15 #include main() { int i=1,n; /***********FOUND***********/ float sum; /***********FOUND***********/ scanf("%d", n); /***********FOUND***********/ for(;i sum+=i; printf("The sum from 1 to %d is %f\n",n,sum); }