将指针数组合并成一个数组(大小不同)，用C

#include <stdio.h>
#include <stdlib.h>

int* mergeArrays(int** arrays, int* sizes, int numArrays, int* mergedSize) {
    // 计算合并后数组的总大小
    int totalSize = 0;
    for (int i = 0; i < numArrays; i++) {
        totalSize += sizes[i];
    }

    // 分配内存空间
    int* mergedArray = (int*)malloc(totalSize * sizeof(int));
    if (mergedArray == NULL) {
        printf("内存分配失败\n");
        return NULL;
    }

    // 复制每个指针指向的数组的元素到合并后的数组中
    int index = 0;
    for (int i = 0; i < numArrays; i++) {
        for (int j = 0; j < sizes[i]; j++) {
            mergedArray[index++] = arrays[i][j];
        }
    }

    // 设置合并后数组的大小
    *mergedSize = totalSize;

    return mergedArray;
}

int main() {
    int array1[] = {1, 2, 3};
    int array2[] = {4, 5};
    int array3[] = {6, 7, 8, 9};

    int* arrays[] = {array1, array2, array3};
    int sizes[] = {3, 2, 4};
    int numArrays = sizeof(arrays) / sizeof(arrays[0]);

    int mergedSize;
    int* mergedArray = mergeArrays(arrays, sizes, numArrays, &mergedSize);

    printf("合并后的数组：");
    for (int i = 0; i < mergedSize; i++) {
        printf("%d ", mergedArray[i]);
    }
    printf("\n");

    // 释放内存
    free(mergedArray);

    return 0;
}