在C++中使用指向無符號長整型而不是長長整型的指針

Question

我想將無符號整型*（也定義爲std :: size_t）類型的指針傳遞給MKL函數，該函數期望它是long long *是64位整數，我得到類型不兼容性錯誤。我在64位整數模式下使用MKL。任何幫助？ 謝謝

Answer 1

#include <limits.h> 

int main() { 
    unsigned int i = UINT_MAX; 
    unsigned int iptr = &i 

    // In writing this, I realized that you have to change the original 
    // or declare a new llong, but remember that 
    // returning a pointer to a local is bad. Change the original if you can. 
    if(i > LLONG_MAX) i = LLONG_MAX; 
    long long *lptr = (long long *)i; 
}