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C++ Pointers and References

bookLink Between Pointer and Variable

When you modify the value through the dereferenced pointer, you are essentially modifying the content of the memory location it points to. This directly affects the original variable.

Remember

Changing the value through *(p_variable) is equivalent to changing the value of variable.

Tehtävä

Swipe to start coding

In real-world monitoring systems, sensor readings can sometimes be invalid or out of expected range.
For example, a temperature sensor might give negative values due to errors, or a sensor might report values above the maximum allowed limit.

In this task, you will implement a function that normalizes a sensor reading using a pointer.
The normalization rules are:

  • If the sensor reading is negative, set it to 0.

  • If the sensor reading is greater than 100, set it to 100.

  1. Inside the normalizeSensor function, use the pointer to access the sensor value (*p_sensor).
  2. Apply the normalization rules:
    • If the value pointed to by the pointer is less than 0, set it to 0.
    • If the value pointed to by the pointer is greater than 100, set it to 100.
  3. Do not modify any variables outside of this function; all changes must be done through the pointer.

Ratkaisu

solution.cpp

solution.cpp

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bookLink Between Pointer and Variable

Pyyhkäise näyttääksesi valikon

When you modify the value through the dereferenced pointer, you are essentially modifying the content of the memory location it points to. This directly affects the original variable.

Remember

Changing the value through *(p_variable) is equivalent to changing the value of variable.

Tehtävä

Swipe to start coding

In real-world monitoring systems, sensor readings can sometimes be invalid or out of expected range.
For example, a temperature sensor might give negative values due to errors, or a sensor might report values above the maximum allowed limit.

In this task, you will implement a function that normalizes a sensor reading using a pointer.
The normalization rules are:

  • If the sensor reading is negative, set it to 0.

  • If the sensor reading is greater than 100, set it to 100.

  1. Inside the normalizeSensor function, use the pointer to access the sensor value (*p_sensor).
  2. Apply the normalization rules:
    • If the value pointed to by the pointer is less than 0, set it to 0.
    • If the value pointed to by the pointer is greater than 100, set it to 100.
  3. Do not modify any variables outside of this function; all changes must be done through the pointer.

Ratkaisu

solution.cpp

solution.cpp

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