#include<cstdio>

int main()

{

int a,b,c;

scanf_s("%d%d%d",&a,&b,&c);

printf("%d,%d,%d\n",a,b,c);

return 0;

}

按debug调试运行，弹出cmd.exe,输入3 4 5后，结果报错如下

'test3.exe': Loaded 'C:\Users\Wukun\Documents\Visual Studio 2010\Projects\vc\test3\Debug\test3.exe', Symbols loaded.

'test3.exe': Loaded 'C:\Windows\SysWOW64\ntdll.dll', Symbols loaded (source information stripped).

'test3.exe': Loaded 'C:\Windows\SysWOW64\kernel32.dll', Symbols loaded (source information stripped).

'test3.exe': Loaded 'C:\Windows\SysWOW64\KernelBase.dll', Symbols loaded (source information stripped).

'test3.exe': Loaded 'C:\Windows\SysWOW64\msvcr100d.dll', Symbols loaded (source information stripped).

The thread 'Win32 Thread' (0x1090) has exited with code 0 (0x0).

The thread 'Win32 Thread' (0x35fc) has exited with code 0 (0x0).

The program '[18832] test3.exe: Native' has exited with code 0 (0x0).

改用组合键ctrl+F5，弹出cmd.exe,输入3 4 5后，结果如下：

（原因来自c++ - The program has exited with Code 0 (HELP) - Stack Overflow）

即 program executed faster than you were able to read the output. You didn't specify your IDE but I deduce Visual Studio, in which case try pressing ctrl + F5.