c - C编程-将一个先前生成的列表从另一个函数改组为输出0的函数

Question

我正在尝试从另一个函数generate()中的一个函数shuffle()改组生成的列表，但我似乎无法使其正常工作。我得到的输出是一个全0的数组，除了最后一位输出为10。

这是代码：

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

#define N 10 //Defining a constant N

int * generate(int i); //Declaring function generate(int numList[N], int i);
int * shuffle(int toShuffle[N], int i, int j, int num); //Declaring function shuffle(int i, int j);

int main() {  //The Main Method
    int * array;
    //int * array2;
    int i = 0, j = 0, num = 0;  //variables
    //int temp = 0;

    printf("Generating an ascending list of integers:\n\n");
    array = generate(i);  //Executes function generate(int numList[N], int i)
    printf("\n-----------------------------------------------------------------");

    printf("\n\nShuffling the previously generated list:\n\n");
    array = shuffle(array, i, j, num);   //Executes function shuffle(int i, int j, int num)
    printf("\n-----------------------------------------------------------------");

    return 0; //End of program
}

int * generate(int i){
    static int array[N] = {0};
    for (i = 1; i <= N; i++) {                  
        array[i] = i;                       
        printf("%d   ", array[i]);  
    }
    return array;
}


void swap (int *num1, int *num2){
     int temp = *num1; 
    *num1 = *num2; 
    *num2 =  temp; 
}

//A function to shuffle a sorted array
int * shuffle(int array[], int i, int j, int num){
    static int toShuffle[N] = {};
    toShuffle[N] = array[N];
    srand(time(NULL)); //Using the time variable as time is always changing, making the program shuffle randomly every time

    num = sizeof(toShuffle) / sizeof(toShuffle[0]);

    for (i = num-1; i > 0; i--) {
        j = rand() % (i + 1);
        swap(&toShuffle[i], &toShuffle[j]);
        printf("%d is swapped with %d\n", toShuffle[i], toShuffle[j]); //Displaying the two swapped values
    }

    printf("\n"); //New line

    for (i = 1; i <= N; i++) {
        printf("%d   ", toShuffle[i]); //Printing the final Shuffled array
    }
    return toShuffle;
}

这是我得到的输出：

Answer 1

您没有将阵列正确复制到toSuffle。您的声明仅复制一个元素。

此外，您的代码还存在数组索引问题。在C中，索引从0开始。