_variant_t s
1,我要让他变成string,或int。还有反过来怎么做?
#include<iostream.h>
#include<string.h>
#include <stdio.h>
void main()
{
_variant_t s;
s = "asdfafds";
char * aa="123";
int bb=aa;
cout<<s<<endl;
cout<<bb<<endl;
}
-----------------
error C2065: '_variant_t' : undeclared identifier2,在使用_variant_t类型前要引入什么类吗?
1,我要让他变成string,或int。还有反过来怎么做?
#include<iostream.h>
#include<string.h>
#include <stdio.h>
void main()
{
_variant_t s;
s = "asdfafds";
char * aa="123";
int bb=aa;
cout<<s<<endl;
cout<<bb<<endl;
}
-----------------
error C2065: '_variant_t' : undeclared identifier2,在使用_variant_t类型前要引入什么类吗?
int i = (int)(long)s;_variant_t str("asdfafds");
char* pstr = (char*)str;
{
case VT_BOOL:
value = var.boolVal;
break;
case VT_UI1:
case VT_I1:
value = var.bVal;
break;
case VT_I2:
case VT_UI2:
value = var.iVal;
break;
case VT_NULL:
case VT_EMPTY:
value = 0;
break;
default:
TRACE(_T("Warning: 未处理的 _variant_t 类型值; 文件: %s; 行: %d\n"), __FILE__, __LINE__);
}
return value;
#include<string.h>
#include <stdio.h>
#include <comdef.h>void main(){
_variant_t s(123, VT_I4);
int i = (int)(long)s;}
#include<string.h>
#include <stdio.h>
#include <comdef.h>void main(){
_variant_t s(123, VT_I4);
int i = (int)(long)s;}error C2668: '_variant_t::_variant_t' : ambiguous call to overloaded function
Error executing cl.exe.
#include<string.h>
#include <stdio.h>
#include <comdef.h>void main(){
_variant_t s(123, VT_I4);
int i = (int)(long)s;}
error C2668: '_variant_t::_variant_t' : ambiguous call to overloaded function
Error executing cl.exe.
long t=123;
_variant_t s(t,VT_I4);