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(C++) AssertExample1

 

STLQt CreatorWindows

 

assert example 1: basics is an assert example.

 

A division will only succeed if the denominator is unequal to zero. In your code, you will have to take care that a division by zero never occurs. Using assert, as shown in the code below, will take you to the problem directly.

 

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Qt project file: ./CppAssertExample1/CppAssertExample1.pro

 

include(../../ConsoleApplication.pri) #Or use the code below
# QT += core
# QT += gui
# greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
# CONFIG   += console
# CONFIG   -= app_bundle
# TEMPLATE = app
# CONFIG(release, debug|release) {
#   DEFINES += NDEBUG NTRACE_BILDERBIKKEL
# }
# QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++
# unix {
#   QMAKE_CXXFLAGS += -Werror
# }

SOURCES += main.cpp

 

 

 

 

 

./CppAssertExample1/main.cpp

 

#include <cassert>
#include <iostream>

int main()
{
  const double numerator = 1.0;
  const double denominator = 0.0;
  assert(denominator != 0.0);
  const double result = numerator / denominator;
  std::cout << result << std::endl;
}

/* Screen output with 'Projects | Run | Run in terminal' checked

Assertion failed!

Program: E:\Projects\Test\build-CppAssert-Desktop_Qt_5_1_0_MinGW_32bit-Debug\deb
ug\CppAssert.exe
File: ../CppAssert/main.cpp, Line 7

Expression: denominator != 0.0

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
Press <RETURN> to close this window...

*/

/* Screen output with 'Projects | Run | Run in terminal' unchecked

Starting E:\Projects\Test\build-CppAssert-Desktop_Qt_5_1_0_MinGW_32bit-Debug\debug\CppAssert.exe...
Cannot retrieve debugging output.

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
E:\Projects\Test\build-CppAssert-Desktop_Qt_5_1_0_MinGW_32bit-Debug\debug\CppAssert.exe exited with code 3

*/

 

 

 

 

 

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