Question

Consider this code snippet:

if (x < 512) {

y = 73;

} else {

y = 42;

}

Which of these goto-style code snippets is equivalent to that if/else code?

Consider this code snippet:

if (x < 512) {

y = 73;

} else {

y = 42;

}

Which of these goto-style code snippets is equivalent to that if/else code?

a.

if (x >= 512) goto Label1;

y = 73;

goto Label2;

Label1:

y = 42;

Label2:

b.

if (x < 512) goto Label1;

y = 73;

goto Label2;

Label1:

y = 42;

Label2:

c.

if (x < 512) goto Label1;

Label1:

y = 42;

goto Label3;

Label2:

y = 73;

goto Label3;

Label3:

d.

if (x < 512) goto Label1;

Label1:

y = 73;

goto Label2;

y = 42;

Label2:

Answer 1

Hi,

Please find the answer below:
-------------------------------

Correct Answer: a

Explanation:

If/else code:
For all x values < 512 y is assigned to 73
for all x values >= 512 y is assigned to 42.

Option A code does exactly the same thing.

For all x >= 512 the code goes to label 1 where y = 42
For all x < 512 the code skips the if and y = 73.
if (x >= 512) goto Label1;
y = 73;
goto Label2;
Label1:
y = 42;
Label2:

------------------------------

Testing the options with a sample C driver program:
We can test the options with a Sample c test driver created.Run the program with the different options.

We will see that the if/else clause and option A
outputs are equal.

#include <stdio.h>

int main() {

int x,y;
//x=511;
x=513;

if (x >= 512)
   goto Label1;
y = 73;
goto Label2;
Label1:
y = 42;
Label2:
  
printf("x= %d\n",x);
printf("y= %d\n",y);
return 0;
}

-------------------------------
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