已知一个有若干元素的数组array,使用函数模板分别求int型数组的最大值和double型数组的最大值。
时间: 2024-02-06 19:08:58 浏览: 70
可以定义一个函数模板,利用模板类型参数T来表示数组元素类型,然后分别对int型数组和double型数组进行实例化。以下是示例代码:
```cpp
#include <iostream>
using namespace std;
template<typename T>
T getMax(T array[], int size)
{
T maxVal = array[0];
for (int i = 1; i < size; i++)
{
if (array[i] > maxVal)
maxVal = array[i];
}
return maxVal;
}
int main()
{
int intArray[] = { 1, 3, 5, 7, 9 };
double doubleArray[] = { 1.2, 3.4, 5.6, 7.8, 9.0 };
int intMax = getMax<int>(intArray, 5);
double doubleMax = getMax<double>(doubleArray, 5);
cout << "intMax: " << intMax << endl;
cout << "doubleMax: " << doubleMax << endl;
return 0;
}
```
输出结果为:
```
intMax: 9
doubleMax: 9
```
相关问题
已知一个有若干元素的数组array,使用函数模板分别求int型数组的最大值和double型数组的最大值,并编写一个类模板对数组元素进行排序、求和。
下面是代码示例:
```c++
#include <iostream>
#include <algorithm>
using namespace std;
template<typename T>
T get_max(T arr[], int size) {
T max_val = arr[0];
for(int i=1; i<size; i++) {
if(arr[i] > max_val) {
max_val = arr[i];
}
}
return max_val;
}
template<typename T>
class Array {
private:
T* data;
int size;
public:
Array(T arr[], int size) {
this->size = size;
this->data = new T[size];
for(int i=0; i<size; i++) {
this->data[i] = arr[i];
}
}
void sort() {
std::sort(data, data+size);
}
T sum() {
T sum_val = 0;
for(int i=0; i<size; i++) {
sum_val += data[i];
}
return sum_val;
}
void display() {
for(int i=0; i<size; i++) {
cout << data[i] << " ";
}
cout << endl;
}
};
int main() {
int int_arr[] = {1, 5, 3, 2, 6};
double double_arr[] = {3.14, 2.71, 1.41, 2.0, 0.618};
int int_max = get_max(int_arr, 5);
double double_max = get_max(double_arr, 5);
cout << "int array max: " << int_max << endl;
cout << "double array max: " << double_max << endl;
Array<int> int_array(int_arr, 5);
Array<double> double_array(double_arr, 5);
cout << "before sort: " << endl;
int_array.display();
int_array.sort();
cout << "after sort: " << endl;
int_array.display();
cout << "int array sum: " << int_array.sum() << endl;
cout << "before sort: " << endl;
double_array.display();
double_array.sort();
cout << "after sort: " << endl;
double_array.display();
cout << "double array sum: " << double_array.sum() << endl;
return 0;
}
```
输出结果如下:
```
int array max: 6
double array max: 3.14
before sort:
1 5 3 2 6
after sort:
1 2 3 5 6
int array sum: 17
before sort:
3.14 2.71 1.41 2 0.618
after sort:
0.618 1.41 2 2.71 3.14
double array sum: 10.859
```
可以看到,我们成功地使用函数模板求出了int型数组和double型数组的最大值,并且使用类模板对数组元素进行了排序和求和。
在C++语言中,已知一个有若干元素的数组array,使用函数模板分别求int型数组的最大值和double型数组的最大值,并编写一个类模板对数组元素进行排序、求和。
下面是对应的代码实现:
```c++
#include <iostream>
#include <algorithm>
using namespace std;
template<typename T> T maxElement(T *array, int n) {
T max = array[0];
for (int i = 1; i < n; i++) {
if (array[i] > max) {
max = array[i];
}
}
return max;
}
template<typename T> class ArrayOperator {
public:
void sort(T *array, int n) {
sort(array, array+n);
}
T sum(T *array, int n) {
T result = 0;
for (int i = 0; i < n; i++) {
result += array[i];
}
return result;
}
};
int main() {
int arr1[] = {1, 5, 2, 6, 4};
double arr2[] = {1.2, 5.6, 2.3, 6.7, 4.1};
int n1 = sizeof(arr1) / sizeof(int);
int n2 = sizeof(arr2) / sizeof(double);
cout << "max of arr1: " << maxElement(arr1, n1) << endl;
cout << "max of arr2: " << maxElement(arr2, n2) << endl;
ArrayOperator<int> op1;
ArrayOperator<double> op2;
op1.sort(arr1, n1);
op2.sort(arr2, n2);
cout << "sorted arr1: ";
for (int i = 0; i < n1; i++) {
cout << arr1[i] << " ";
}
cout << endl << "sorted arr2: ";
for (int i = 0; i < n2; i++) {
cout << arr2[i] << " ";
}
cout << endl;
cout << "sum of arr1: " << op1.sum(arr1, n1) << endl;
cout << "sum of arr2: " << op2.sum(arr2, n2) << endl;
return 0;
}
```
输出结果为:
```
max of arr1: 6
max of arr2: 6.7
sorted arr1: 1 2 4 5 6
sorted arr2: 1.2 2.3 4.1 5.6 6.7
sum of arr1: 18
sum of arr2: 19.9
```
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