z = x ./ getMaxValue(abs(x)) .* 0.5 + 0.5;
时间: 2023-05-12 16:03:09 浏览: 56
这是一个MATLAB代码,其中"./"表示元素除法,".*"表示元素乘法,"abs"表示取绝对值,"getMaxValue"是一个自定义函数,它返回输入向量中的最大值。最终结果是将向量x中的每个元素除以最大值的绝对值,然后乘以0.5。
相关问题
下面java代码转化为c import java.util.*; public class Main{ public static void main(String args[]) { Scanner scan = new Scanner(System.in); String line; while (scan.hasNextLine()) { line = scan.nextLine().trim(); // please write your code here String[] strs=line.split("\\s+"); int[]ints=new int[strs.length]; for(int i=0;i<strs.length;i++) { ints[i]=Integer.valueOf(strs[i]); } try { int[]ints1=sort(ints); for(int i=0;i<ints1.length;i++) { System.out.print(ints1[i]+" "); } } catch (Exception e) { e.printStackTrace(); } System.out.println(); } } static int[] sort(int[] sourceArray) throws Exception { int[] arr = Arrays.copyOf(sourceArray, sourceArray.length); int maxDigit = getMaxDigit(arr); return radixSort(arr, maxDigit); } static int getMaxDigit(int[] arr) { int maxValue = getMaxValue(arr); return getNumLenght(maxValue); } static int getNumLenght(long num) { if (num == 0) { return 1; } int lenght = 0; for (long temp = num; temp != 0; temp /= 10) { lenght++; } return lenght; } static int getMaxValue(int[] arr) { int maxValue = arr[0]; for (int value : arr) { if (maxValue < value) { maxValue = value; } } return maxValue; } static int[] radixSort(int[] arr, int maxDigit) { int mod = 10; int dev = 1; for (int i = 0; i < maxDigit; i++, dev *= 10,mod *= 10) { int[][] counter = new int[20][0]; for (int j = 0; j < arr.length; j++) { int bucket = ((arr[j] % mod) / dev)+10; counter[bucket] = arrayAppend(counter[bucket], arr[j]); } int pos = 0; for (int[] bucket : counter) { for (int value : bucket) { arr[pos++] = value; } } } return arr; } static int[] arrayAppend(int[] arr, int value) { arr = Arrays.copyOf(arr, arr.length + 1); arr[arr.length - 1] = value; return arr; } }
下面是将Java代码转换为C的等效代码:
c
#include <stdio.h>
#include <stdlib.h>
int* arrayAppend(int* arr, int value, int length) {
arr = (int*)realloc(arr, (length + 1) * sizeof(int));
arr[length] = value;
return arr;
}
int getMaxValue(int* arr, int length) {
int maxValue = arr[0];
for (int i = 1; i < length; i++) {
if (maxValue < arr[i]) {
maxValue = arr[i];
}
}
return maxValue;
}
int getNumLength(long num) {
if (num == 0) {
return 1;
}
int length = 0;
for (long temp = num; temp != 0; temp /= 10) {
length++;
}
return length;
}
int getMaxDigit(int* arr, int length) {
int maxValue = getMaxValue(arr, length);
return getNumLength(maxValue);
}
int* radixSort(int* arr, int length, int maxDigit) {
int mod = 10;
int dev = 1;
for (int i = 0; i < maxDigit; i++, dev *= 10, mod *= 10) {
int** counter = (int**)malloc(20 * sizeof(int*));
for (int j = 0; j < 20; j++) {
counter[j] = (int*)malloc(0 * sizeof(int));
}
for (int j = 0; j < length; j++) {
int bucket = ((arr[j] % mod) / dev) + 10;
counter[bucket] = arrayAppend(counter[bucket], arr[j], sizeof(counter[bucket]) / sizeof(counter[bucket][0]));
}
int pos = 0;
for (int j = 0; j < 20; j++) {
for (int k = 0; k < sizeof(counter[j]) / sizeof(counter[j][0]); k++) {
arr[pos++] = counter[j][k];
}
free(counter[j]);
}
free(counter);
}
return arr;
}
int* sort(int* sourceArray, int length) {
int* arr = (int*)malloc(length * sizeof(int));
for (int i = 0; i < length; i++) {
arr[i] = sourceArray[i];
}
int maxDigit = getMaxDigit(arr, length);
return radixSort(arr, length, maxDigit);
}
int main() {
char line[100];
while (fgets(line, sizeof(line), stdin)) {
int ints[100];
int intsLength = 0;
char* token = strtok(line, " ");
while (token != NULL) {
ints[intsLength++] = atoi(token);
token = strtok(NULL, " ");
}
int* sortedInts = sort(ints, intsLength);
for (int i = 0; i < intsLength; i++) {
printf("%d ", sortedInts[i]);
}
printf("\n");
free(sortedInts);
}
return 0;
}
```
需要注意的是,C语言中没有内置的动态数组,因此我们需要使用`realloc`和`malloc`来动态分配和重新分配内存。另外,在C语言中,我们需要手动释放动态分配的内存,以避免内存泄漏。在这个C代码中,我们使用了`malloc`和`realloc`来分配和重新分配内存,并使用`free`来释放内存。
此外,为了与Java代码中的`Scanner`相对应,我们使用了`fgets`来从标准输入读取整行输入,并使用`strtok`来将输入字符串分割成整数数组。最后,我们通过循环打印排序后的整数数组,并在每行结束后释放内存。
请注意,上述代码是根据Java代码逐行转换得来的,可能不是最优的C实现。为了提高性能和效率,你可以进一步优化该代码。
不使用LINQ查询和操作集合 改进代码 namespace SandwichCalories { class Program { static void Main(string[] args) { // sandwich ingredients and their associated calories Dictionary<string, int> ingredients = new Dictionary<string, int>() { { "Bread", 66 }, { "Ham", 72 }, { "Bologna", 57 }, { "Chicken", 17 }, { "Corned Beef", 53 }, { "Salami", 40 }, { "Cheese, American", 104 }, { "Cheese, Cheddar", 113 }, { "Cheese, Havarti", 105 }, { "Mayonnaise", 94 }, { "Mustard", 10 }, { "Butter", 102 }, { "Garlic Aioli", 100 }, { "Sriracha", 15 }, { "Dressing, Ranch", 73 }, { "Dressing, 1000 Island", 59 }, { "Lettuce", 5 }, { "Tomato", 4 }, { "Cucumber", 4 }, { "Banana Pepper", 10 }, { "Green Pepper", 3 }, { "Red Onion", 6 }, { "Spinach", 7 }, { "Avocado", 64 } }; // prompt user for calorie range Console.Write("Enter minimum calories: "); int min_calories = int.Parse(Console.ReadLine()); Console.Write("Enter maximum calories: "); int max_calories = int.Parse(Console.ReadLine()); // calculate the minimum and maximum calories for the sandwich int min_sandwich_calories = 2 * ingredients["Bread"] + ingredients.Values.Min() * 2; int max_sandwich_calories = 2 * ingredients["Bread"] + ingredients.Values.Max() * 2; // check if the calorie range is valid if (max_calories < min_sandwich_calories) { Console.WriteLine("Sorry, it is impossible to create a sandwich within the given calorie range."); } else { // create the sandwich List<string> sandwich = new List<string> { "Bread" }; int sandwich_calories = 1 * ingredients["Bread"]; while (sandwich_calories < min_calories) { // add random ingredient string ingredient = ingredients.Keys.ElementAt(new Random().Next(ingredients.Count)); sandwich.Add(ingredient); sandwich_calories += ingredients[ingredient]; } while (sandwich_calories <= max_calories) { // add random ingredient string ingredient = ingredients.Keys.ElementAt(new Random().Next(ingredients.Count)); // check if the ingredient is the same as the previous one if (sandwich.Count >= 3 && ingredient == sandwich[sandwich.Count - 2]) { continue; } sandwich.Add(ingredient); sandwich_calories += ingredients[ingredient]; // check if the sandwich is already at the maximum calorie limit if (sandwich_calories == max_sandwich_calories) { break; } } // add the last slice of bread sandwich.Add("Bread"); // print the sandwich and its total calories Console.WriteLine("Your sandwich: " + string.Join(", ", sandwich)); Console.WriteLine("Total calories: " + sandwich_calories); } } } }
以下是不使用LINQ查询和操作集合改进的代码,这里使用了foreach循环和if条件语句来实现相同的功能:
```csharp
using System;
using System.Collections.Generic;
namespace SandwichCalories
{
class Program
{
static void Main(string[] args)
{
// sandwich ingredients and their associated calories
Dictionary<string, int> ingredients = new Dictionary<string, int>() {
{ "Bread", 66 },
{ "Ham", 72 },
{ "Bologna", 57 },
{ "Chicken", 17 },
{ "Corned Beef", 53 },
{ "Salami", 40 },
{ "Cheese, American", 104 },
{ "Cheese, Cheddar", 113 },
{ "Cheese, Havarti", 105 },
{ "Mayonnaise", 94 },
{ "Mustard", 10 },
{ "Butter", 102 },
{ "Garlic Aioli", 100 },
{ "Sriracha", 15 },
{ "Dressing, Ranch", 73 },
{ "Dressing, 1000 Island", 59 },
{ "Lettuce", 5 },
{ "Tomato", 4 },
{ "Cucumber", 4 },
{ "Banana Pepper", 10 },
{ "Green Pepper", 3 },
{ "Red Onion", 6 },
{ "Spinach", 7 },
{ "Avocado", 64 }
};
// prompt user for calorie range
Console.Write("Enter minimum calories: ");
int min_calories = int.Parse(Console.ReadLine());
Console.Write("Enter maximum calories: ");
int max_calories = int.Parse(Console.ReadLine());
// calculate the minimum and maximum calories for the sandwich
int min_sandwich_calories = 2 * ingredients["Bread"] + GetMinValue(ingredients.Values) * 2;
int max_sandwich_calories = 2 * ingredients["Bread"] + GetMaxValue(ingredients.Values) * 2;
// check if the calorie range is valid
if (max_calories < min_sandwich_calories)
{
Console.WriteLine("Sorry, it is impossible to create a sandwich within the given calorie range.");
}
else
{
// create the sandwich
List<string> sandwich = new List<string> { "Bread" };
int sandwich_calories = 1 * ingredients["Bread"];
while (sandwich_calories < min_calories)
{
// add random ingredient
string ingredient = GetRandomIngredient(ingredients);
sandwich.Add(ingredient);
sandwich_calories += ingredients[ingredient];
}
while (sandwich_calories <= max_calories)
{
// add random ingredient
string ingredient = GetRandomIngredient(ingredients);
// check if the ingredient is the same as the previous one
if (sandwich.Count >= 3 && ingredient == sandwich[sandwich.Count - 2])
{
continue;
}
sandwich.Add(ingredient);
sandwich_calories += ingredients[ingredient];
// check if the sandwich is already at the maximum calorie limit
if (sandwich_calories == max_sandwich_calories)
{
break;
}
}
// add the last slice of bread
sandwich.Add("Bread");
// print the sandwich and its total calories
Console.WriteLine("Your sandwich: " + string.Join(", ", sandwich));
Console.WriteLine("Total calories: " + sandwich_calories);
}
}
// helper methods
static int GetMinValue(IEnumerable<int> values)
{
int minValue = int.MaxValue;
foreach (int value in values)
{
if (value < minValue)
{
minValue = value;
}
}
return minValue;
}
static int GetMaxValue(IEnumerable<int> values)
{
int maxValue = int.MinValue;
foreach (int value in values)
{
if (value > maxValue)
{
maxValue = value;
}
}
return maxValue;
}
static string GetRandomIngredient(Dictionary<string, int> ingredients)
{
int index = new Random().Next(ingredients.Count);
int i = 0;
foreach (string key in ingredients.Keys)
{
if (i == index)
{
return key;
}
i++;
}
return null;
}
}
}
```
在这个改进的代码中,我们使用了GetMinValue和GetMaxValue方法来获取字典中值的最小值和最大值,使用GetRandomIngredient方法来获取随机的食材名称。虽然这种方式代码量增加了,但是这种方式可以更好地理解代码的每个步骤,也可以更好地掌控代码的细节。
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