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…
求奇数分之一序列前N项和 #include <stdio.h> int main() { int denominator, i, n; double item, sum; while (scanf("%d", &n) != EOF) { denominator = 1; sum = 0; for (i = 1; i <= n; i++) { item = 1.0/denominator; sum = sum+item; denominator = denomi…
求N分之一序列前N项和 #include <stdio.h> int main() { int i, n; double item, sum; while (scanf("%d", &n) != EOF) { sum = 0; for (i = 1; i <= n; i++) { item = 1.0/i; sum = sum+item; } printf("sum = %f\n", sum); } return 0; }…
练习2-13 求N分之一序列前N项和 (15 分) 输入在一行中给出一个正整数N. 输出格式: 在一行中按照“sum = S”的格式输出部分和的值S,精确到小数点后6位.题目保证计算结果不超过双精度范围. 输入样例: 6 输出样例: sum = 2.450000 #include <stdio.h> #include <stdlib.h> /* run this program using the console pauser or add your own getch, syst…
求简单交错序列前N项和 #include <stdio.h> int main() { int denominator, flag, i, n; double item, sum; while (scanf("%d", &n) != EOF) { flag = 1; denominator = 1; sum = 0; for (i = 1; i <= n; i++) { item = flag*1.0/denominator; sum = sum+item;…