Example: Swap by Value (Problematic) in C

C
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// Swap by Value (Problematic)
#include <stdio.h>

void swapByValue(int a, int b) {
    int temp = a;
    a = b;
    b = temp;
    printf("Inside function: a = %d, b = %d\n", a, b);
}

int main() {
    int num1 = 10;
    int num2 = 20;

    printf("Before swapByValue: num1 = %d, num2 = %d\n", num1, num2);
    swapByValue(num1, num2);
    printf("After swapByValue: num1 = %d, num2 = %d\n", num1, num2);

    return 0;
}