This program compiles and runs on TC++ 3.0. Why don’t this program compile in

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Editorial Team

Asked: May 26, 20262026-05-26T08:29:34+00:00 2026-05-26T08:29:34+00:00

This program compiles and runs on TC++ 3.0. Why don’t this program compile in

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This program compiles and runs on TC++ 3.0.

Why don’t this program compile in VC++2008Express?

#include <iostream>

using namespace std;

class MyClass
{
private:
    class MyNestedClass
    {
    private:
        int myInteger;

    public:
        MyNestedClass(int a)
        {
            myInteger = a;
        }
        void Show()
        {
            cout<<myInteger;
        }
    };
};

int main()
{
    MyClass::MyNestedClass myNestedClassObject(100);

    myNestedClassObject.Show();
}

The following messages are shown:

1>------ Rebuild All started: Project: Test, Configuration: Debug Win32 ------
1>Deleting intermediate and output files for project 'Test', configuration 'Debug|Win32'
1>Compiling...
1>Static_Data_Member.c
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(39) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(39) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(46) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(46) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(46) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(46) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(46) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(46) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(47) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(47) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(47) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(47) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(47) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(47) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(48) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(48) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(48) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(48) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(48) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(48) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(49) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(49) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(49) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(49) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(50) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(50) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(50) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(50) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(51) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(51) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(51) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(51) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(51) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(51) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(52) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(52) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(52) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(52) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(52) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(52) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(53) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(53) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(53) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(53) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(53) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(53) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(54) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(54) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(54) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(54) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(54) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(54) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(55) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(55) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(55) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(55) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(55) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(55) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(56) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdio(56) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(21) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(21) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(21) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(21) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(21) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(21) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(23) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(23) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(23) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(23) : error C2059: syntax error : ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(23) : error C2143: syntax error : missing '{' before ':'
1>c:\program files\microsoft visual studio 9.0\vc\include\cstdlib(23) : fatal error C1003: error count exceeds 100; stopping compilation
1>Build log was saved at "file://h:\Test\Debug\BuildLog.htm"
1>Test - 102 error(s), 0 warning(s)
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========

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1 Answer

Editorial Team · Answer 1 · 2026-05-26T08:29:34+00:00

Editorial Team

2026-05-26T08:29:34+00:00Added an answer on May 26, 2026 at 8:29 am

This is a C++ program, but you’ve given your source file a .c extension.

By default, the Visual C++ compiler compiles .c files as C. Use a .cpp extension or compile with the /TP flag to compile the source as C++.

However, even if you compile the source as C++, the program is still invalid. MyNestedClass is a private member type of MyClass, so you cannot construct an instance of it in main().

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