在C++中使用指向无符号长整型而不是长长整型的指针

Question

我想将无符号整型*（也定义为std :: size_t）类型的指针传递给MKL函数，该函数期望它是long long *是64位整数，我得到类型不兼容性错误。我在64位整数模式下使用MKL。任何帮助？ 谢谢

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; 
}