如何將值轉換為整數類型的字符串？

Question

我們都知道要轉換字符串中的值，我們可以執行以下操作

char* buffer = ... allocate a buffer ...
int value = 4564;
sprintf(buffer, "%d", value);

但是如果我想將數據轉換為整數緩沖區而不是字符緩沖區，那我該怎么辦呢？

int* buffer = ... allocate a buffer ...
int value = 4564;
sprintf(buffer, "%d", value);

提前致謝

Answer 1

確保將緩沖區定義為“值”的值，而不是指向“值”地址的指針。 見下文：

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

int main(int argc, char** argv)
{
    /* Allocate memory. */
    int* buffer = malloc(sizeof(int));

    int value = 1000;

    /* Sets the number stored in buffer equal to value. */
    *buffer = value;

    /* prints 1000 */
    printf("%d\n", *buffer);

    /* Change value to show buffer is not pointing to the address of 'value'. */
    value = 500;

    /* Still prints 1000. If we had used 
    int* buffer = &value, it would print 500. */
    printf("%d\n", *buffer);

    return 0;
}