供参考:
#include <stdio.h>
int main()
{
int i = 1, n, k = -1;
double x, s = 1, t = 1;
scanf("%lf%d", &x, &n);
while (i <= n) {
t *= i * 1.0 / x;
s += k * t;
k = -k;
i++;
}
printf("%.6f", s);
return 0;
}
望采纳
下面是一个示例 C 语言代码,可以用来计算式子中的 S 的近似值,并保留小数点后六位:
#include <stdio.h>
#include <math.h>
// 计算阶乘的函数
int factorial(int n) {
if (n == 0 || n == 1) {
return 1;
} else {
int result = 1;
for (int i = 2; i <= n; i++) {
result *= i;
}
return result;
}
}
int main() {
double x;
int numTerms;
printf("Enter a number for x: ");
scanf("%lf", &x);
printf("Enter the number of terms to include in the approximation: ");
scanf("%d", &numTerms);
// 计算 S 的值
double S = 1;
for (int i = 1; i <= numTerms; i++) {
S += -(factorial(i) / pow(x, i));
}
// 保留小数点后六位并输出结果
printf("The approximate value of S is: %.*lf\n", 6, S);
return 0;
}