I know its simple code, How do I fix "System not declared in scope" problem?
Heres my end message:
C:Documents and SettingsNiloMy DocumentsWorkTestingmain.cpp||In function ‘int main()’:| C:Documents and SettingsNiloMy DocumentsWorkTestingmain.cpp|8|error: ‘system’ was not declared in this scope||
|=== Build finished: 1 errors, 0 warnings ===|
2 Answers 2
You need to add:
in order for the compiler to see the prototype for system() .
Chances are that you’ve not included the header file that declares system() .
In order to be able to compile C++ code that uses functions which you don’t (manually) declare yourself, you have to pull in the declarations. These declarations are normally stored in so-called header files that you pull into the current translation unit using the #include preprocessor directive. As the code does not #include the header file in which system() is declared, the compilation fails.
To fix this issue, find out which header file provides you with the declaration of system() and include that. As mentioned in several other answers, you most likely want to add #include
Not the answer you’re looking for? Browse other questions tagged c++ compiler-errors or ask your own question.
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In file included from C:Program FilesArduinolibrariesLCD_1602_RUS-master/LCD_1602_RUS.h:1:0,
from money_box_counter.ino:35:
C:Program FilesArduinolibrariesLCD_1602_RUS-master/LiquidCrystal_I2C.h:7:18: fatal error: Wire.h: No such file or directory
#include
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compilation terminated.
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G:LEDcube-masterCUBE_Gyver_v2CUBE_Gyver_v2.ino: In function ‘void setup()’:
CUBE_Gyver_v2:132:9: error: ‘class GButton’ has no member named ‘setStepTimeout’
butt1.setStepTimeout(100); // настрйока интервала инкремента (по умолчанию 800 мс)
CUBE_Gyver_v2:133:9: error: ‘class GButton’ has no member named ‘setStepTimeout’
butt2.setStepTimeout(100); // настрйока интервала инкремента (по умолчанию 800 мс)
G:LEDcube-masterCUBE_Gyver_v2CUBE_Gyver_v2.ino: In function ‘void loop()’:
CUBE_Gyver_v2:144:13: error: ‘class GButton’ has no member named ‘isClick’
CUBE_Gyver_v2:149:13: error: ‘class GButton’ has no member named ‘isClick’
CUBE_Gyver_v2:155:13: error: ‘class GButton’ has no member named ‘isStep’
CUBE_Gyver_v2:158:13: error: ‘class GButton’ has no member named ‘isStep’
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exit status 1
‘class GButton’ has no member named ‘setStepTimeout’
G:LEDcube-masterCUBE_GyverCUBE_Gyver.ino: In function ‘void setup()’:
CUBE_Gyver:82:9: error: ‘class GButton’ has no member named ‘setIncrStep’
butt1.setIncrStep(5); // настройка инкремента, может быть отрицательным (по умолчанию 1)
CUBE_Gyver:83:9: error: ‘class GButton’ has no member named ‘setIncrTimeout’
butt1.setIncrTimeout(100); // настрйока интервала инкремента (по умолчанию 800 мс)
CUBE_Gyver:84:9: error: ‘class GButton’ has no member named ‘setIncrStep’
butt2.setIncrStep(-5); // настройка инкремента, может быть отрицательным (по умолчанию 1)
CUBE_Gyver:85:9: error: ‘class GButton’ has no member named ‘setIncrTimeout’
butt2.setIncrTimeout(100); // настрйока интервала инкремента (по умолчанию 800 мс)
G:LEDcube-masterCUBE_GyverCUBE_Gyver.ino: In function ‘void loop()’:
CUBE_Gyver:106:13: error: ‘class GButton’ has no member named ‘isIncr’
CUBE_Gyver:107:23: error: ‘class GButton’ has no member named ‘getIncr’
modeTimer = butt1.getIncr(modeTimer); // увеличивать/уменьшать переменную value с шагом и интервалом
CUBE_Gyver:109:13: error: ‘class GButton’ has no member named ‘isIncr’
CUBE_Gyver:110:23: error: ‘class GButton’ has no member named ‘getIncr’
modeTimer = butt2.getIncr(modeTimer); // увеличивать/уменьшать переменную value с шагом и интервалом
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exit status 1
‘class GButton’ has no member named ‘setIncrStep’
C:Program Files (x86)ArduinolibrariesGyverHacksGyverHacks.cpp:326:1: error: prototype for ‘GTimer::GTimer(uint16_t)’ does not match any in class ‘GTimer’
In file included from C:Program Files (x86)ArduinolibrariesGyverHacksGyverHacks.cpp:1:0:
C:Program Files (x86)ArduinolibrariesGyverHacksGyverHacks.h:99:7: error: candidates are: constexpr GTimer::GTimer(GTimer&&)
C:Program Files (x86)ArduinolibrariesGyverHacksGyverHacks.h:99:7: error: constexpr GTimer::GTimer(const GTimer&)
C:Program Files (x86)ArduinolibrariesGyverHacksGyverHacks.h:103:2: error: GTimer::GTimer(uint32_t)
GTimer(uint32_t); // объявление таймера с указанием интервала
C:Program Files (x86)ArduinolibrariesGyverHacksGyverHacks.cpp:324:1: error: GTimer::GTimer()
C:Program Files (x86)ArduinolibrariesGyverHacksGyverHacks.cpp:331:6: error: prototype for ‘void GTimer::setInterval(uint16_t)’ does not match any in class ‘GTimer’
void GTimer::setInterval(uint16_t interval) <
In file included from C:Program Files (x86)ArduinolibrariesGyverHacksGyverHacks.cpp:1:0:
C:Program Files (x86)ArduinolibrariesGyverHacksGyverHacks.h:104:7: error: candidate is: void GTimer::setInterval(uint32_t)
void setInterval(uint32_t); // установка интервала
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exit status 1
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sketch emperature.cpp: In static member function ‘static void Temperature::isr()’:
temperature.cpp:2009: error: ‘ADC_KEYPAD_PIN’ was not declared in this scope
sketch emperature.cpp:1919:32: note: in definition of macro ‘START_ADC’
#define START_ADC(pin) if (pin > 7) ADCSRB = _BV(MUX5); else ADCSRB = 0; SET_ADMUX_ADCSRA(pin)
temperature.cpp:2009: error: ‘ADC_KEYPAD_PIN’ was not declared in this scope
sketch emperature.cpp:1917:55: note: in definition of macro ‘SET_ADMUX_ADCSRA’
#define SET_ADMUX_ADCSRA(pin) ADMUX = _BV(REFS0) | (pin & 0x07); SBI(ADCSRA, ADSC)
sketch emperature.cpp:2009:9: note: in expansion of macro ‘START_ADC’
‘ADC_KEYPAD_PIN’ was not declared in this scope