小白问个小问题

初学C++，课本上一个最简单的程序，为什么无法显示啊？
#include <iostream>
using namespace std;
int main()
{
cout<<"welcome"<<endl;
return 0;
}
运行结果
'hello.exe': Loaded 'C:\Users\ljy\Documents\Visual Studio 2010\Projects\hello\Debug\hello.exe', Symbols loaded.
'hello.exe': Loaded 'C:\Windows\System32\ntdll.dll', Cannot find or open the PDB file
'hello.exe': Loaded 'C:\Windows\System32\kernel32.dll', Cannot find or open the PDB file
'hello.exe': Loaded 'C:\Windows\System32\KernelBase.dll', Cannot find or open the PDB file
'hello.exe': Loaded 'C:\Windows\System32\msvcp100d.dll', Symbols loaded.
'hello.exe': Loaded 'C:\Windows\System32\msvcr100d.dll', Symbols loaded.
The program '[4964] hello.exe: Native' has exited with code -1073741510 (0xc000013a).
请问是什么原因呢？