用C语言编写一个程序用递归算法将一个整数n转换成相应的字符串。例如输入483，应输出字符串“483”，n的位数不确定，可以是任意位数的整数。

在C语言中，你可以通过递归的方式将整数转换成字符串。这里是一个基本的实现思路，使用了栈来存储每一位的值，然后逐个取出并拼接成字符串。

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

// 函数声明，用于保存每一位的值
typedef struct {
    int digit;
    char is_negative;
} StackElement;

// 创建一个栈结构体
struct Stack {
    StackElement *top;
    int size;
};

// 初始化栈
Stack* create_stack() {
    Stack *stack = (Stack*)malloc(sizeof(Stack));
    stack->top = NULL;
    stack->size = 0;
    return stack;
}

// 清理栈并释放内存
void destroy_stack(Stack *stack) {
    free(stack->top);
    free(stack);
}

// 向栈顶添加元素
void push(Stack *stack, int digit, bool is_negative) {
    StackElement *new_top = (StackElement*)malloc(sizeof(StackElement));
    new_top->digit = digit;
    new_top->is_negative = is_negative;
    new_top->next = stack->top;
    stack->top = new_top;
    stack->size++;
}

// 从栈顶移除并返回元素
StackElement* pop(Stack *stack) {
    StackElement *temp = stack->top;
    if (stack->top != NULL) {
        stack->top = temp->next;
        stack->size--;
        free(temp);
    }
    return stack->top;
}

// 转换整数为字符串
char* convert_int_to_str(int n) {
    Stack *stack = create_stack();
    bool negative = false;

    if (n < 0) {
        negative = true;
        n = -n;
    }

    while (n > 0) {
        push(stack, n % 10, negative);
        n /= 10;
    }

    char* str = (char*)malloc((stack->size + 1) * sizeof(char)); // +1 for null terminator
    if (negative) {
        str[0] = '-';
        stack->size++; // account for the negative sign
    }

    while (stack->top != NULL) {
        str[stack->size] = stack->top->digit + '0'; // add ASCII value of digits to string
        stack->size++;
        stack->top = pop(stack);
    }
    str[stack->size] = '\0';

    return str;
}

int main() {
    int num;
    printf("Enter an integer: ");
    scanf("%d", &num);
    char* str = convert_int_to_str(num);
    printf("Converted string: %s\n", str);
    destroy_stack(&stack); // Remember to clean up after use
    free(str);
    return 0;
}