从小到大排序c语言数组(c语言数组输入10个数从小到大排序)

Introduction

In computer programming, arrays are one of the most commonly used data structures. They are a collection of related elements stored in contiguous memory locations. The C programming language provides a powerful and flexible way to work with arrays. In this article, we will discuss the process of sorting a C language array from smallest to biggest values. Sorting an array requires the use of some key algorithms that help to rearrange the elements of the array in a deterministic manner.

The Sorting Algorithm

The most common algorithm used for sorting an array is the "bubble sort." The bubble sort works by making multiple passes over the array, and at each pass, it swaps adjacent elements if they are out of order. The algorithm repeats this process until the array is completely sorted. Another common algorithm is the "quick sort." This algorithm works by selecting a pivot point, dividing the array into smaller arrays that are less than and greater than the pivot point, and then recursively sorting each smaller array until the entire array is sorted. There are different strategies for selecting pivot points, and the choice of pivot point can have a significant impact on the sorting time.

The C Language Implementation

To sort an array of integers in C language, we can use the inbuilt function called "qsort." The qsort function sorts an array by using the quicksort algorithm. The signature of the qsort function is as follows:
void qsort(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *));
The first parameter is the address of the array to be sorted, and the second parameter is the number of elements in the array. The third parameter is the size of each element in the array, and the fourth parameter is a pointer to a comparison function that is used to compare the elements in the array. The comparison function takes two void pointers as arguments and returns an integer value indicating the relative order of the two elements.

Let us consider a sample program that sorts an array of integers in C language. The code for the program is as follows:

#include
#include

int compareFunc(const void *a, const void *b) {
return (*(int*)a - *(int*)b);
}

int main() {
int arr[] = {55, 11, 44, 66, 22, 33};
int size = sizeof(arr) / sizeof(arr[0]);

// sort the array
qsort(arr, size, sizeof(int), compareFunc);

// display the sorted array
for (int i = 0; i < size; i++) {
printf("%d ", arr[i]);
}

return 0;
}

The above program declares an array of integers and initializes it with some values. It then calls the "qsort" function to sort the array. The comparison function is implemented separately, and it takes two pointers to integers and subtracts the second from the first to get the difference. Finally, the program displays the sorted array. Running this program produces the following output:
11 22 33 44 55 66

Conclusion

Sorting arrays in C language is an essential programming skill that every programmer should master. By using the appropriate sorting algorithms and the built-in functions such as "qsort," we can easily sort arrays in C. The choice of the sorting algorithm and the implementation technique depends on the specific requirements of the program, such as the size of the array, the available memory, and the performance goals. With practice and experience, programmers can develop efficient and elegant solutions to sorting problems in C language.