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C Pointer parameter advantages: 1. Memory efficiency; 2. Efficiency; 3. Flexibility; 4. Polymorphism. Disadvantages: 1. Unsafe; 2. Difficult to understand; 3. Execution overhead; 4. Difficult to debug.
Advantages and disadvantages of pointer parameters in C functions
Advantages:
Disadvantages:
Practical case:
The following is an example of a C function using pointer parameters:
void swap(int *a, int *b) { int temp = *a; *a = *b; *b = temp; } int main() { int x = 10, y = 20; swap(&x, &y); cout << "x: " << x << ", y: " << y << endl; // 输出:x: 20, y: 10 }
In this example, The swap
function uses pointer arguments to swap the values of two integers. By passing by reference, a function can modify the original variables passed by the caller without creating copies of them.
Conclusion:
Pointer parameters provide memory efficiency and flexibility in C functions, but you need to pay attention to their safety and understandability. When considering using pointer parameters, you should weigh the advantages and disadvantages to make an informed decision.
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