A programmer implemented a swap function in C as follows: void swap(int x, int y) {  int temp;  temp = x;  x=y;  y = temp; } However when he tried to use the swap function in the main function as given below, it didn’t work. int main () {  int a=10, b=20;  swap(a,b);  ... } i. Explain why this function doesn’t work. ii. Suggest a way of fixing it.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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A programmer implemented a swap function in C as follows:

void swap(int x, int y) {

 int temp;

 temp = x;

 x=y;

 y = temp;

}

However when he tried to use the swap function in the main function as given below,

it didn’t work.

int main () {

 int a=10, b=20;

 swap(a,b);

 ...

}

i. Explain why this function doesn’t work.

ii. Suggest a way of fixing it.

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