View Compilation Error

0_0_1826908_22813.cpp
0_0_1826908_22813.cpp(15) : error C2079: “out1”使用未定义的 class“std::basic_ostringstream<_Elem,_Traits,_Alloc>”
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
        0_0_1826908_22813.cpp(15) : 参见对正在编译的类模板实例化“std::basic_ostringstream<_Elem,_Traits,_Alloc>”的引用
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
        0_0_1826908_22813.cpp(15) : 参见对正在编译的类模板实例化“std::basic_ostringstream<_Elem,_Traits,_Alloc>”的引用
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
0_0_1826908_22813.cpp(15) : error C2079: “out2”使用未定义的 class“std::basic_ostringstream<_Elem,_Traits,_Alloc>”
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
        0_0_1826908_22813.cpp(15) : 参见对正在编译的类模板实例化“std::basic_ostringstream<_Elem,_Traits,_Alloc>”的引用
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
        0_0_1826908_22813.cpp(15) : 参见对正在编译的类模板实例化“std::basic_ostringstream<_Elem,_Traits,_Alloc>”的引用
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
0_0_1826908_22813.cpp(15) : error C2079: “out”使用未定义的 class“std::basic_ostringstream<_Elem,_Traits,_Alloc>”
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
        0_0_1826908_22813.cpp(15) : 参见对正在编译的类模板实例化“std::basic_ostringstream<_Elem,_Traits,_Alloc>”的引用
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
        0_0_1826908_22813.cpp(15) : 参见对正在编译的类模板实例化“std::basic_ostringstream<_Elem,_Traits,_Alloc>”的引用
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
0_0_1826908_22813.cpp(18) : error C2297: “<<” : 非法，右操作数包含“const char [2]”类型
0_0_1826908_22813.cpp(19) : error C2228: “.str”的左侧必须有类/结构/联合类型
        类型是“int”
0_0_1826908_22813.cpp(19) : error C2079: “sin1”使用未定义的 class“std::basic_istringstream<_Elem,_Traits,_Alloc>”
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
        0_0_1826908_22813.cpp(19) : 参见对正在编译的类模板实例化“std::basic_istringstream<_Elem,_Traits,_Alloc>”的引用
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
        0_0_1826908_22813.cpp(19) : 参见对正在编译的类模板实例化“std::basic_istringstream<_Elem,_Traits,_Alloc>”的引用
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Alloc=std::allocator<char>
        ]
0_0_1826908_22813.cpp(19) : fatal error C1903: 无法从以前的错误中恢复；正在停止编译