发布时间:2019-08-25 09:33:22编辑:auto阅读(1673)
方法一:for循环实现 程序: #include<stdio.h> int main() { double i = 0, t = 0,sum = 0,sign = -1; for (i = 1; i <= 100; i++) { sign = -sign; t =sign/ i; sum = sum + t; } printf("sum=%lf\n",sum); return 0; } 方法二:while循环实现 程序: #include<stdio.h> int main() { double i = 1, t = 0,sum = 0,sign = -1; while (i <= 100) { sign = -sign; t =sign/ i; sum = sum + t; i++; } printf("sum=%lf\n",sum); return 0; } 方法三:do...while循环实现 #include<stdio.h> int main() { double i = 1, t = 0,sum = 0,sign = -1; do { sign = -sign; t =sign/ i; sum = sum + t; i++; } while (i <= 100); printf("sum=%lf\n",sum); return 0; } 结果: sum=0.688172 请按任意键继续. . .
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