我正在尝试创建一个函数,该函数打印每行的所有最大元素的总和。我编写了一个函数,该函数可打印2D数组的5个最大元素,并计算总和,我需要将所有最大元素放入一个数组中。现在我不知道为什么我的代码会向我显示错误的值,感谢您提供的任何帮助。
#include <stdio.h>
#define MATRIX_SIZE 5
void bubleSort(int arr[MATRIX_SIZE][MATRIX_SIZE])
{
for (int i = 0; i < MATRIX_SIZE; i++)
{
for (int j = 0; j < MATRIX_SIZE; j++)
{
for (int h = j + 1; h < MATRIX_SIZE; h++)
{
if (arr[j][i] > arr[h][i])
{
int tmp = arr[j][i];
arr[j][i] = arr[h][i];
arr[h][i] = tmp;
}
}
}
}
}
int find_max_sum(int arr[MATRIX_SIZE][MATRIX_SIZE])
{
int sum = 0;
for (int i = 0; i < MATRIX_SIZE; i++)
{
int max = arr[i][0];
for (int j = 1; j < MATRIX_SIZE; j++)
{
if (max < arr[i][j])
{
max = arr[i][j];
}
}
printf("%d-th row max = %d\n", i + 1, max);
sum += max;
}
return sum;
}
int printing(int arr[MATRIX_SIZE][MATRIX_SIZE])
{
for (int i = 0; i < MATRIX_SIZE; i++)
{
for (int j = 0; j < MATRIX_SIZE; j++)
{
printf("%5.0d", arr[i][j]);
}
printf("\n");
}
puts("\n");
return 0;
}
int main() {
int arr[MATRIX_SIZE][MATRIX_SIZE] = {
{ 12, 7, 23, 13, 4 },
{ 67, 15, 34, -5, 9 },
{ 2, 5, 17, -23, 45 },
{ 26, -6, 23, -5, -9 },
{ 18, 37, -8, 26, 12 }
};
printing(arr);
printf("\nSum of max elements of 2d array = %d\n", find_max_sum(arr));
bubleSort(arr);
printing(arr);
printf("\nSum of max elements of 2d array = %d\n", find_max_sum(arr));
}
(已更新)
我有一个任务来排序和打印每行的最大元素并打印它们的总和,但是我必须将其打印在单独的函数中,我必须至少具有3个函数-sort,maxElementOfEachRow,Sum(maxElementOfEachRow),所以这就是原因我问过将max元素放入数组以在下一个函数Sum中使用它的方法,还是有另一种方法可以解决此问题?
答案 0 :(得分:1)
您无需对元素进行排序即可获得一行的最大值。
从数组中选择最大元素(无序)是O(n)操作,而对数组进行排序则需要O(n ^ 2)时间(在冒泡排序的情况下)和O(nlogn)(如果使用quicksort或mergesort) 。
这是无需排序的解决方案
希望对您有所帮助
#include <stdio.h>
#define ROWS 5
#define COLS 5
void bubbleSort(int arr[ROWS][COLS]) {
// Sorting in ascending order
for (int row = 0; row < ROWS; row++) {
for (int i = 0; i < COLS - 1; i++) {
for (int j = i + 1; j < COLS; j++) {
if (arr[row][i] > arr[row][j]) {
int tmp = arr[row][i];
arr[row][i] = arr[row][j];
arr[row][j] = tmp;
}
}
}
}
}
void max_element_of_each_row(int arr[ROWS][COLS], int sumArr[ROWS]) {
for (int i = 0; i < ROWS; i++) {
sumArr[i] = arr[i][COLS - 1]; // Last element is the max element
}
}
int sum_arr(int sumArr[ROWS]) {
int sum = 0;
for (int i = 0; i < ROWS; i++) {
sum += sumArr[i];
}
return sum;
}
int find_max_sum(int arr[ROWS][COLS]) {
int sum = 0;
for (int i = 0; i < ROWS; i++) {
int max = arr[i][0];
for (int j = 1; j < COLS; j++) {
if (max < arr[i][j]) {
max = arr[i][j];
}
}
printf("%dth row max = %d\n", i + 1, max);
sum += max;
}
return sum;
}
void print_max_element_of_each_row(int sumArr[ROWS]) {
for (int i = 0; i < ROWS; i++) {
printf("%dth row max = %d\n", i + 1, sumArr[i]);
}
}
void print(int arr[ROWS][COLS]) {
for (int i = 0; i < ROWS; i++) {
for (int j = 0; j < COLS; j++) {
printf("%d\t", arr[i][j]);
}
printf("\n");
}
}
void solution2(int arr[ROWS][COLS]) {
printf("Before sorting\n");
print(arr);
bubbleSort(arr);
printf("After sorting\n");
print(arr);
int sumArr[ROWS];
max_element_of_each_row(arr, sumArr);
print_max_element_of_each_row(sumArr);
printf("Sum of max elements of each row: %d", sum_arr(sumArr));
}
void solution1(int arr[ROWS][COLS]) {
print(arr);
printf("Max sum of 2d array = %d", find_max_sum(arr));
}
int main() {
int arr[ROWS][COLS] = {12, 7, 23, 13, 4, 67, 15, 34, -5, 9, 2, 5, 17,
-23, 45, 26, -6, 23, -5, -9, 18, 37, -8, 26, 12};
// solution1(arr);
solution2(arr);
}
输出(用于solution1):
12 7 23 13 4
67 15 34 -5 9
2 5 17 -23 45
26 -6 23 -5 -9
18 37 -8 26 12
第一排最大= 23
第二排最大= 67
第三排最大= 45
第四排最大= 26
第5行上限= 37
2d数组的总和= 198
输出(用于solution2):
排序之前
12 7 23 13 4
67 15 34 -5 9
2 5 17 -23 45
26 -6 23 -5 -9
18 37 -8 26 12
排序后
4 7 12 13 23
-5 9 15 34 67
-23 2 5 17 45
-9 -6 -5 23 26
-8 12 18 26 37
第一排最大= 23
第二排最大= 67
第三排最大= 45
第四排最大= 26
第5行上限= 37
每行的最大元素总数:198
答案 1 :(得分:0)
每行的最大值及其总和可以在一对循环中找到。
#include <stdio.h>
#include <limits.h>
#define ROWS 5
#define COLS 5
int main(void) {
int arr[ROWS][COLS] = {
{ 12, 7, 23, 13, 4 },
{ 67, 15, 34, -5, 9 },
{ 2, 5, 17, -23, 45 },
{ 26, -6, 23, -5, -9 },
{ 18, 37, -8, 26, 12 }
};
int maxsum = 0;
for(int row = 0; row < ROWS; row++) {
int rowmax = INT_MIN;
for(int col = 0; col < COLS; col++) {
if(rowmax < arr[row][col]) {
rowmax = arr[row][col];
}
}
printf("Row %d max = %d\n", row + 1, rowmax);
maxsum += rowmax;
}
printf("Sum of max = %d\n", maxsum);
}
程序输出:
Row 1 max = 23 Row 2 max = 67 Row 3 max = 45 Row 4 max = 26 Row 5 max = 37 Sum of max = 198
答案 2 :(得分:0)
#include <stdio.h>
#define MATRIX_SIZE 5
void bubleSort(int arr[MATRIX_SIZE][MATRIX_SIZE]) // sorting an array by buble sort in descending order
{
for (int i = 0; i < MATRIX_SIZE; i++)
{
for (int j = 0; j < MATRIX_SIZE; j++)
{
for (int h = j + 1; h < MATRIX_SIZE; h++)
{
if (arr[j][i] < arr[h][i])
{
int tempt = arr[j][i];
arr[j][i] = arr[h][i];
arr[h][i] = tempt;
}
}
}
}
}
int find_max_elm(int arr[MATRIX_SIZE][MATRIX_SIZE], int sumArr[MATRIX_SIZE]) // findind max element in each row of a 2d array
{
for (int i = 0; i < MATRIX_SIZE; i++)
{
int max = arr[i][0];
for (int j = 1; j < MATRIX_SIZE; j++)
{
if (max < arr[i][j])
{
max = arr[i][j];
}
}
sumArr[i] = max;
}
}
int sum_arr(int sumArr[MATRIX_SIZE]) // calculating the summ of all max elements in each row of a 2d array
{
int sum = 0;
for (int i = 0; i < MATRIX_SIZE; i++)
{
sum += sumArr[i];
}
return sum;
}
void print_max_element_of_each_row(int sumArr[MATRIX_SIZE]) // printing all max elements in each row of a 2d array
{
for (int i = 0; i < MATRIX_SIZE; i++)
{
printf("%d-th row max = %d\n", i + 1, sumArr[i]);
}
}
int printing(int arr[MATRIX_SIZE][MATRIX_SIZE]) // printing an array = matrix
{
for (int i = 0; i < MATRIX_SIZE; i++)
{
for (int j = 0; j < MATRIX_SIZE; j++)
{
printf("%5.0d", arr[i][j]);
}
printf("\n");
}
puts("\n");
return 0;
}
int main() {
int arr[MATRIX_SIZE][MATRIX_SIZE] = {
{ 12, 7, 23, 13, 4 },
{ 67, 15, 34, -5, 9 },
{ 2, 5, 17, -23, 45 },
{ 26, -6, 23, -5, -9 },
{ 18, 37, -8, 26, 12 }
};
printf("Before sorting\n");
printing(arr);
bubleSort(arr);
printf("After sorting\n");
printing(arr);
int sumArr[MATRIX_SIZE];
find_max_elm(arr, sumArr);
print_max_element_of_each_row(sumArr);
printf("\nSum of max elements of each row: %d", sum_arr(sumArr));
}