[觀點][C語言]即使函式內的變數和local變數名稱一樣，但跳出函式後就無關

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

void foo(int* x)
{
    x = (int*)malloc(sizeof(int));
    *x = 12;
}

int main()
{
    int x = 10;
    foo(&x);
    printf("x = %d\n", x);
    return 0;
}

[answer]
x = 10