Rewriting C code (also in C++) 4. 120 points] Consider the following Pascal prog

Question

Rewriting C code (also in C++)

4. 120 points] Consider the following Pascal program: program Progl (input, output); function test (var x, y: integer; z : integer) integer; begin z:= x + y; x:= 2 * z; := x + 3; testz; end; var i,j,k,w integer; begin write 'Enter values readln (i, j, k) w := test (i, j, k); writeln ('output: ', i,'',j,'', k,'',w) end a. Rewrite the above code in C using pointers, printf, and scanf. b. Rewrite the above code in C++ using reference parameters, cout, and cin c. What does the program print if the input is entered with 3 4 5?

Explanation / Answer

(A)

#include<stdio.h>

int test(int *x, int *y, int *z)

{

    *z = (*x) + (*y);

    *x = 2 * (*z);

    *y = (*x) + 3;

   

    return *z;

}

int main()

{

    int i , j , k , w;

   

    printf("Enter values : ");

   

    // get user input

    scanf("%d%d%d", &i, &j, &k);

   

    w = test( &i , &j , &k );

   

    printf("Output : %d , %d , %d , %d", i , j , k , w);

   

    return 0;

}

(B)

#include<iostream>

using namespace std;

int test(int& x, int& y, int& z)

{

    z = x + y;

    x = 2 * z;

    y = x + 3;

   

    return z;

}

int main()

{

    int i , j , k , w;

   

    cout<<"Enter values : ";

   

    // get user input

    cin>>i>>j>>k;

   

    w = test( i , j , k );

   

    cout<<"Output : "<<i<<" , "<<j<<" , "<<k<<" , "<<w<<endl;

   

    return 0;

}

(C)

i = 3

j = 4

k = 5

Inside test():

x = 3 ( i in main )

y = 4 ( j in main )

z = 5 ( k in main )

Now,

z = x + y = 3 + 4

z = 7

x = 2 * z = 2 * 7

x = 14

y = x + 3

y = 17

In main():

i = 14

j = 17

k = 7

w = 7

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