Write the definition of a function named swapints that is passed two int variables. The function returns nothing but exchanges the values of the two variables. So, if j and k have (respectively) the values 15 and 23, and the invocation swapints(j,k) is made, then upon return, the values of j and k will be 23 and 15 respectively.

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This is the answer:

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void swapints(int& j, int & k)
{int temp=j;
 j=k;
 k=temp;}

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