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Which of the following is true about default arguments in C++ functions?
- a)Default arguments must be specified in the function declaration.
- b)Default arguments must be specified in the function definition.
- c)Default arguments can be overridden by providing a value during function call.
- d)Default arguments are not allowed in C++.
Correct answer is option 'A'. Can you explain this answer?
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Which of the following is true about default arguments in C++ function...
Default arguments should be specified in the function declaration, allowing them to be omitted during function call.
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Which of the following is true about default arguments in C++ function...
Default Arguments in C Functions
Default arguments in C functions provide a way to assign a default value to a parameter if no value is provided during function call. This allows for greater flexibility and convenience in function usage. In the context of the given options, option 'A' is the correct answer.
Explanation:
Default arguments can be specified in either the function declaration or the function definition. However, it is important to note that default arguments must be specified in the function declaration if the function is to be used before its definition in the code.
Default Arguments in the Function Declaration:
- When default arguments are specified in the function declaration, they provide the default values for the corresponding parameters.
- The function declaration includes the function name, parameter types, and optionally, the default values for the parameters.
- The default values are assigned using the assignment operator '='.
- The function declaration should be placed in a header file or at the beginning of the source file before any function calls.
Default Arguments in the Function Definition:
- If the default arguments are not specified in the function declaration, they can be included in the function definition.
- The function definition includes the function name, parameter types, and the function body.
- The default values are assigned using the assignment operator '='.
- The function definition should be placed after the function declaration in the source file.
Using Default Arguments:
- When calling a function with default arguments, the programmer has the option to provide values for the parameters or omit them.
- If a value is provided for a parameter during the function call, it overrides the default argument value.
- If a value is not provided for a parameter during the function call, the default argument value is used.
- The function call should include the function name and the values for the parameters, if any.
Conclusion:
In C, default arguments can be specified in both the function declaration and definition. However, if the function is used before its definition, the default arguments must be specified in the function declaration. This provides flexibility in function usage by allowing for default values to be assigned to parameters if no value is provided during function call.
Default arguments in C functions provide a way to assign a default value to a parameter if no value is provided during function call. This allows for greater flexibility and convenience in function usage. In the context of the given options, option 'A' is the correct answer.
Explanation:
Default arguments can be specified in either the function declaration or the function definition. However, it is important to note that default arguments must be specified in the function declaration if the function is to be used before its definition in the code.
Default Arguments in the Function Declaration:
- When default arguments are specified in the function declaration, they provide the default values for the corresponding parameters.
- The function declaration includes the function name, parameter types, and optionally, the default values for the parameters.
- The default values are assigned using the assignment operator '='.
- The function declaration should be placed in a header file or at the beginning of the source file before any function calls.
Default Arguments in the Function Definition:
- If the default arguments are not specified in the function declaration, they can be included in the function definition.
- The function definition includes the function name, parameter types, and the function body.
- The default values are assigned using the assignment operator '='.
- The function definition should be placed after the function declaration in the source file.
Using Default Arguments:
- When calling a function with default arguments, the programmer has the option to provide values for the parameters or omit them.
- If a value is provided for a parameter during the function call, it overrides the default argument value.
- If a value is not provided for a parameter during the function call, the default argument value is used.
- The function call should include the function name and the values for the parameters, if any.
Conclusion:
In C, default arguments can be specified in both the function declaration and definition. However, if the function is used before its definition, the default arguments must be specified in the function declaration. This provides flexibility in function usage by allowing for default values to be assigned to parameters if no value is provided during function call.
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Which of the following is true about default arguments in C++ functions?a)Default arguments must be specified in the function declaration.b)Default arguments must be specified in the function definition.c)Default arguments can be overridden by providing a value during function call.d)Default arguments are not allowed in C++.Correct answer is option 'A'. Can you explain this answer?
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