求阶乘序列前N项和 #include <stdio.h> double fact(int n); int main() { int i, n; double item, sum; while (scanf("%d", &n) != EOF) { sum = 0; if (n <= 12) { for (i = 1; i <= n; i++) { item = fact(i); sum = sum + item; } } printf("%.0f
求平方根序列前N项和 #include <stdio.h> #include <math.h> int main() { int i, n; double item, sum; while (scanf("%d", &n) != EOF) { sum = 0; for (i = 1; i <= n; i++) { item = sqrt(i); sum = sum+item; } printf("sum = %.2f\n", s
Gas Station There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the journ