- When I try to compile a simple number game with cygwin 4.9.3-1, it says stoi was not declared in this scope. I don't know what I'm doing wrong, and cannot find a way to fix it.
- Stoi Not Working Dev C 2017. When I try to compile a simple number game with cygwin 4.9.3-1, it says stoi was not declared in this scope. I don't know what I'm doing.
以下是编译Android 4.0.3的常见错误，这些错误的解决办法收录自互联网。
Error: `cout’ was not declared in this scope “Error: ` cout ‘was not declared in this scope” C / C + + rounding function ceil, floor The usage and difference of atoi and stoi functions in C + + C error: jump to case label crosses initialization; The use of C + + template function and lambda expression. I'm working with strings (#include ) and want to convert a string into an int using stoi I've gone through my code several times and I don't think there is anything wrong with it. However I have read about compilers and there might be an issue / incompatibility with mine. For info I'm on windows 7 64 bit, using Dev-C version 4.9.9.1. Codeblocks16.01error: ‘stoi’ was not declared in this scope 今天使用C特性中的stoi和stod的时候（要包含头文件 #include 哦），程序运行报错。 检查了我的设置，发现也引入了C特性呀（如下图所示）为什么还是报错呢？.
Google group有个专门的Android Building组，有兴趣的可以加入。
有转载这里（http://www.linuxidc.com/Linux/2014-03/97625.htm）的也有添加的。
################# Fix 1 ##########################
Error:
frameworks/base/include/utils/KeyedVector.h:193:31: note: declarations in dependent base ‘android::KeyedVector<android::String8, android::sp<AaptDir> >’ are not found by unqualified lookup
frameworks/base/include/utils/KeyedVector.h:193:31: note: use ‘this->indexOfKey’ instead
make: *** [out/host/linux-x86/obj/EXECUTABLES/aapt_intermediates/AaptAssets.o] Error 1
Fix:
vi frameworks/base/tools/aapt/Android.mk
Add '-fpermissive' to line 31:
LOCAL_CFLAGS += -Wno-format-y2k -fpermissive
################## Fix 2 ##########################
Error：
frameworks/base/include/utils/KeyedVector.h:193:31: error: ‘indexOfKey’ was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive]
frameworks/base/include/utils/KeyedVector.h:193:31: note: declarations in dependent base ‘android::KeyedVector<android::String8, android::wp<android::AssetManager::SharedZip> >’ are not found by unqualified lookup
frameworks/base/include/utils/KeyedVector.h:193:31: note: use ‘this->indexOfKey’ instead
make: *** [out/host/linux-x86/obj/STATIC_LIBRARIES/libutils_intermediates/AssetManager.o] Error 1
Fix:
vi frameworks/base/libs/utils/Android.mk
Add '-fpermissive' to line 64:
LOCAL_CFLAGS += -DLIBUTILS_NATIVE=1 $(TOOL_CFLAGS) -fpermissive
################## Fix 3 ##########################
Error:
external/srec/tools/thirdparty/OpenFst/fst/lib/cache.h:136:11: note: use ‘this->SetState’ instead
make: *** [out/host/linux-x86/obj/EXECUTABLES/grxmlcompile_intermediates/grxmlcompile.o] Error 1
Fix:
cd external/srec
wget 'https://github.com/CyanogenMod/android_external_srec/commit/4d7ae7b79eda47e489669fbbe1f91ec501d42fb2.diff'
patch -p1 < 4d7ae7b79eda47e489669fbbe1f91ec501d42fb2.diff
rm -f 4d7ae7b79eda47e489669fbbe1f91ec501d42fb2.diff
cd ../..
################## Fix 3.1 ##########################
Error:
host C++: obbtool <= frameworks/base/tools/obbtool/Main.cpp
host C: parseStringTest <= external/srec/tools/parseStringTest/parseStringTest.c
<命令行>:0:0: 错误： “_FORTIFY_SOURCE”重定义 [-Werror]
frameworks/base/tools/obbtool/Main.cpp:1:0: 附注： 这是先前定义的位置
make: *** [out/host/linux-x86/obj/EXECUTABLES/obbtool_intermediates/Main.o] 错误 1
Fix:
vi build/core/combo/HOST_linux-x86.mk line56
Add -U_FORTIFY_SOURCE
HOST_GLOBAL_CFLAGS += -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
################## Fix 4 ##########################
Error:
development/tools/emulator/opengl/host/tools/emugen/main.cpp:79:9: error: ‘optind’ was not declared in this scope
development/tools/emulator/opengl/host/tools/emugen/main.cpp:92:45: error: ‘optind’ was not declared in this scope
make: *** [out/host/linux-x86/obj/EXECUTABLES/emugen_intermediates/main.o] Error 1
Fix:
vi development/tools/emulator/opengl/host/tools/emugen/main.cpp
Add '#include <getopt.h>' to list of includes:
#include <getopt.h>
################## Fix 5 ##########################
Error:
host C++: liboprofile_pp <= external/oprofile/libpp/arrange_profiles.cpp
In file included from external/oprofile/libpp/arrange_profiles.cpp:24:0:
external/oprofile/libpp/format_output.h:94:22: error: reference ‘counts’ cannot be declared ‘mutable’ [-fpermissive]
make: *** [out/host/linux-x86/obj/STATIC_LIBRARIES/liboprofile_pp_intermediates/arrange_profiles.o] Error 1
Fix:
vi external/oprofile/libpp/format_output.h
Remove 'mutable' from 'mutable counts_t & counts;' on line 94:
counts_t & counts;
################## Fix 6 ##########################
Error:
development/tools/emulator/opengl/shared/OpenglCodecCommon/GLSharedGroup.cpp:345:65: required from here
frameworks/base/include/utils/KeyedVector.h:193:31: error: ‘indexOfKey’ was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive]
frameworks/base/include/utils/KeyedVector.h:193:31: note: declarations in dependent base ‘android::KeyedVector<unsigned int, ShaderData*>’ are not found by unqualified lookup
frameworks/base/include/utils/KeyedVector.h:193:31: note: use ‘this->indexOfKey’ instead
make: *** [out/host/linux-x86/obj/STATIC_LIBRARIES/libOpenglCodecCommon_intermediates/GLSharedGroup.o] Error 1
Fix:
vi development/tools/emulator/opengl/Android.mk
Add '-fpermissive' to line 25:
EMUGL_COMMON_CFLAGS := -DWITH_GLES2 -fpermissive
################## Fix 7 ##########################
Error:
/usr/bin/ld: note: 'XInitThreads' is defined in DSO /lib/libX11.so.6 so try adding it to the linker command line
/lib/libX11.so.6: could not read symbols: Invalid operation
collect2: error: ld returned 1 exit status
make: *** [out/host/linux-x86/obj/EXECUTABLES/emulator_renderer_intermediates/emulator_renderer] Error 1
Fix:
vi development/tools/emulator/opengl/host/renderer/Android.mk
Add new entry 'LOCAL_LDLIBS += -lX11' after line 6 as shown:
LOCAL_SRC_FILES := main.cpp
LOCAL_CFLAGS += -O0 -g
LOCAL_LDLIBS += -lX11
#ifeq ($(HOST_OS),windows)
#LOCAL_LDLIBS += -lws2_32
################## Fix 8 ##########################
Error:
external/llvm/include/llvm/ADT/PointerUnion.h:56:10: error: enumeral mismatch in conditional expression: ‘llvm::PointerLikeTypeTraits<llvm::PointerUnion<clang::Stmt*, const clang::Type*> >::<anonymous enum>’ vs ‘llvm::PointerLikeTypeTraits<clang::ObjCInterfaceDecl*>::<anonymous enum>’ [-Werror]
cc1plus: all warnings being treated as errors
make: *** [out/host/linux-x86/obj/EXECUTABLES/llvm-rs-cc_intermediates/slang_rs.o] Error 1
Fix:
vi frameworks/compile/slang/Android.mk
Remove '-Werror' from line 22:
local_cflags_for_slang := -Wno-sign-promo -Wall -Wno-unused-parameter
################## Fix 9 ##########################
Error:
frameworks/base/libs/rs/rsFont.cpp:224:76: required from here
frameworks/base/include/utils/KeyedVector.h:193:31: error: ‘indexOfKey’ was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive]
frameworks/base/include/utils/KeyedVector.h:193:31: note: declarations in dependent base ‘android::KeyedVector<unsigned int, android::renderscript::Font::CachedGlyphInfo*>’ are not found by unqualified lookup
frameworks/base/include/utils/KeyedVector.h:193:31: note: use ‘this->indexOfKey’ instead
make: *** [out/host/linux-x86/obj/STATIC_LIBRARIES/libRS_intermediates/rsFont.o] Error 1
Fix:
vi frameworks/base/libs/rs/Android.mk
Add '-fpermissive' to line 183
LOCAL_CFLAGS += -Werror -Wall -Wno-unused-parameter -Wno-unused-variable -fpermissive
################## Fix 10 #########################
Error:
external/mesa3d/src/glsl/linker.cpp:1394:49: error: expected primary-expression before ‘,’ token
......
external/mesa3d/src/glsl/linker.cpp:1734:59: error: ‘offsetof’ was not declared in this scope
make: *** [out/host/linux-x86/obj/STATIC_LIBRARIES/libMesa_intermediates/src/glsl/linker.o] Error 1
Fix:
vi external/mesa3d/src/glsl/linker.cpp
Add '#include <stddef.h>' to list of includes as shown:
#include <climits>
#include <stddef.h>
#include <pixelflinger2/pixelflinger2_interface.h>
################## Fix 11 #########################
Error:
external/gtest/src/../include/gtest/gtest-param-test.h:287:58: note: ‘template<class Container> testing::internal::ParamGenerator<typename Container::value_type> testing::ValuesIn(const Container&)’ declared here, later in the translation unit
make: *** [out/host/linux-x86/obj/STATIC_LIBRARIES/libgtest_host_intermediates/gtest-all.o] Error 1
Two fixes required:
1)
vi external/gtest/src/Android.mk
Add '-fpermissive' to lines 52 and 70 (both lines contain same info)
LOCAL_CFLAGS += -O0 -fpermissive
2)
vi external/gtest/include/gtest/internal/gtest-param-util.h
Add '#include <stddef.h>' to list of includes as shown:
#include <vector>
#include <cstddef>
#include <gtest/internal/gtest-port.h>
################## Fix 12 #########################
Error:
host Executable: test-librsloader (out/host/linux-x86/obj/EXECUTABLES/test-librsloader_intermediates/test-librsloader)
out/host/linux-x86/obj/STATIC_LIBRARIES/libLLVMSupport_intermediates/libLLVMSupport.a(Signals.o)：在函数‘PrintStackTrace’中：
/home/crow/works/Android_src/external/llvm/lib/Support/Unix/Signals.inc:219：对‘dladdr’未定义的引用
/home/crow/works/Android_src/external/llvm/lib/Support/Unix/Signals.inc:231：对‘dladdr’未定义的引用
out/host/linux-x86/obj/STATIC_LIBRARIES/libLLVMSupport_intermediates/libLLVMSupport.a(Threading.o)：在函数‘llvm::llvm_execute_on_thread(void (*)(void*), void*, unsigned int)’中：
/home/crow/works/Android_src/external/llvm/lib/Support/Threading.cpp:96：对‘pthread_create’未定义的引用
/home/crow/works/Android_src/external/llvm/lib/Support/Threading.cpp:100：对‘pthread_join’未定义的引用
/home/crow/works/Android_src/external/llvm/lib/Support/Threading.cpp:91：对‘pthread_attr_setstacksize’未定义的引用
out/host/linux-x86/obj/STATIC_LIBRARIES/libLLVMSupport_intermediates/libLLVMSupport.a(Mutex.o)：在函数‘llvm::sys::MutexImpl::MutexImpl(bool)’中：
/home/crow/works/Android_src/external/llvm/lib/Support/Mutex.cpp:69：对‘pthread_mutexattr_init’未定义的引用
/home/crow/works/Android_src/external/llvm/lib/Support/Mutex.cpp:75：对‘pthread_mutexattr_settype’未定义的引用
/home/crow/works/Android_src/external/llvm/lib/Support/Mutex.cpp:80：对‘pthread_mutexattr_setpshared’未定义的引用
/home/crow/works/Android_src/external/llvm/lib/Support/Mutex.cpp:89：对‘pthread_mutexattr_destroy’未定义的引用
out/host/linux-x86/obj/STATIC_LIBRARIES/libLLVMSupport_intermediates/libLLVMSupport.a(Mutex.o)：在函数‘llvm::sys::MutexImpl::tryacquire()’中：
/home/crow/works/Android_src/external/llvm/lib/Support/Mutex.cpp:143：对‘pthread_mutex_trylock’未定义的引用
collect2: 错误： ld 返回 1
make: *** [out/host/linux-x86/obj/EXECUTABLES/test-librsloader_intermediates/test-librsloader] 错误 1
Fix:
$vi external/llvm/llvm-host-build.mk +
LOCAL_LDLIBS := -lpthread -ldl
更多Android相关信息见Android 专题页面 http://www.linuxidc.com/topicnews.aspx?tid=11
- C++ Basics
- C++ Object Oriented
- C++ Advanced
- C++ Useful Resources
- Selected Reading
All C++ programs are composed of the following two fundamental elements −
Stoi Was Not Declared In This Scope Dev Crossword
Program statements (code) − This is the part of a program that performs actions and they are called functions.
Program data − The data is the information of the program which gets affected by the program functions.
Encapsulation is an Object Oriented Programming concept that binds together the data and functions that manipulate the data, and that keeps both safe from outside interference and misuse. Data encapsulation led to the important OOP concept of data hiding.
Data encapsulation is a mechanism of bundling the data, and the functions that use them and data abstraction is a mechanism of exposing only the interfaces and hiding the implementation details from the user.
C++ supports the properties of encapsulation and data hiding through the creation of user-defined types, called classes. We already have studied that a class can contain private, protected and public members. By default, all items defined in a class are private. For example −
The variables length, breadth, and height are private. This means that they can be accessed only by other members of the Box class, and not by any other part of your program. This is one way encapsulation is achieved.
To make parts of a class public (i.e., accessible to other parts of your program), you must declare them after the public keyword. All variables or functions defined after the public specifier are accessible by all other functions in your program.
Stoi Was Not Declared In This Scope Dev C Program
Making one class a friend of another exposes the implementation details and reduces encapsulation. The ideal is to keep as many of the details of each class hidden from all other classes as possible.
Data Encapsulation Example
Stoi Was Not Declared In This Scope Dev C System
Any C++ program where you implement a class with public and private members is an example of data encapsulation and data abstraction. Consider the following example −
Stoi Was Not Declared In This Scope Dev C Version
When the above code is compiled and executed, it produces the following result −
Stoi Was Not Declared In This Scope Dev Case
Above class adds numbers together, and returns the sum. The public members addNum and getTotal are the interfaces to the outside world and a user needs to know them to use the class. The private member total is something that is hidden from the outside world, but is needed for the class to operate properly.
Designing Strategy
Most of us have learnt to make class members private by default unless we really need to expose them. That's just good encapsulation.
Stoi Was Not Declared In This Scope Dev C 2017
This is applied most frequently to data members, but it applies equally to all members, including virtual functions.