#include<stdlib.h> #include <stdio.h> #include <math.h> #define PI 3.1415926 double f(double x) { return exp(x)cos(4x); // 定义被积函数 } double simpson(double a, double b) { int n = 1000; // 分割区间的个数 double h = (b - a) / n; double sum = 0; for (int i = 0; i < n; i++) { double x1 = a + i * h; double x2 = a + (i + 1) * h; sum += f(x1) + 4 * f((x1 + x2) / 2) + f(x2); } return sum * h / 6; } int main() { double a = 0, b = PI; // 积分区间 [a, b] double result = simpson(a, b); printf("The result is: %lf\n", result); system("pause"); return 0; }写出计算这个代码的函数调用次数的C语言代码
时间: 2024-03-10 22:48:53 浏览: 22
可以在原代码基础上加入计数器,用于统计函数调用的次数,代码如下:
```
#include<stdlib.h>
#include<stdio.h>
#include<math.h>
#define PI 3.1415926
int f_call_count = 0; // 函数f(x)的调用次数计数器
double f(double x) {
f_call_count++; // 每次调用函数f(x)时计数器加1
return exp(x)cos(4x); // 定义被积函数
}
double simpson(double a, double b) {
int n = 1000; // 分割区间的个数
double h = (b - a) / n;
double sum = 0;
for (int i = 0; i < n; i++) {
double x1 = a + i * h;
double x2 = a + (i + 1) * h;
sum += f(x1) + 4 * f((x1 + x2) / 2) + f(x2);
}
return sum * h / 6;
}
int main() {
double a = 0, b = PI; // 积分区间 [a, b]
double result = simpson(a, b);
printf("The result is: %lf\n", result);
printf("The function f(x) is called %d times.\n", f_call_count);
system("pause");
return 0;
}
```
运行程序后,会输出计算结果和函数 `f(x)` 的调用次数。