8.11 C++ How to Program (8th Edition) By Paul Deitel, Harvey Deitel

(Find the Code Errors) Find the error in each of the following segments. If the error can be corrected, explain how.

a)

1234 
int *number;
cout << number << endl;
 

b)

12345 
double *realPtr;
long *integerPtr;
integerPtr = realPtr;
 

c)

1234 
int * x, y;
x = y;
 

d)

12345 
char s[] = "this is a character array";
for ( ; *s != '\0'; ++s)
cout << *s << ' ';
 

e)

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short *numPtr, result;
void *genericPtr = numPtr;
result = *genericPtr + 7;
 

f)

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double x = 19.34;
double xPtr = &x;
cout << xPtr << endl;

Solution:

a)

1234 
int *number;
cout << *number << endl; // number prints number's address
 

b)

12345 
double *realPtr;
long *integerPtr;
*integerPtr = *realPtr; // it is not possible to assign address
 

c)

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int * x, y;
* x = y; // or
x = &y;
 

d)

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char s[] = "this is a character array";
for ( ; *s != '\0'; ++*s)
cout << *s << ' '; // pointer should be incremented
 

e)

123 
will be added
 

f)

12 
will be added