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Join Date: Aug 2004
Location: Minnesota
Posts: 18
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Newbie Poster
Need help figuring out C++ Pointers I am supposed to figure out what the output produced would be from this equation..can anyone help me and explain it to me
char var1='s';
char var2='x';
char *ptr1, *ptr2;
ptr1=&var2;
*ptr2=*ptr1;
cout << *ptr1 << " " < var2 << endl;
char var1='s';
char var2='x';
char *ptr1, *ptr2;
ptr1=&var2;
*ptr2=*ptr1;
cout << *ptr1 << " " < var2 << endl;
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Join Date: Apr 2004
Posts: 3,755
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Behavior is undefined since ptr2 does not point anywhere.
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Join Date: Aug 2004
Location: Minnesota
Posts: 18
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Newbie Poster
Sorry i missed a line when i typed it in..could you take another look now..
char var1='s';
char var2='x';
char *ptr1, *ptr2;
ptr1=&var1;
ptr2=&var2;
*ptr2=*ptr1;
cout << *ptr1 << " " << var2 << endl;
char var1='s';
char var2='x';
char *ptr1, *ptr2;
ptr1=&var1;
ptr2=&var2;
*ptr2=*ptr1;
cout << *ptr1 << " " << var2 << endl;
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Join Date: Apr 2004
Posts: 3,755
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Did you try compiling it and running it?
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s s
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Join Date: Aug 2004
Posts: 10
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Newbie Poster
The code you given has some error, are you sure you are giving the right code?
Anyway, the output should be:
x x
cause ptr1 has been assigned to the address of var2. When you output the value of *ptr1, it will refer to the value of that address.
Anyway, the output should be:
x x
cause ptr1 has been assigned to the address of var2. When you output the value of *ptr1, it will refer to the value of that address.
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Join Date: Aug 2004
Location: Minnesota
Posts: 18
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Newbie Poster
no..because i don't understand how it works..can you please explain it to me...
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Join Date: Aug 2004
Location: Minnesota
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Newbie Poster
i need to know the data types of variables such as:
double var1, *ptr1, *ptr2;
float *ptr3;
int var2, *var4....do you know anything about data types?
double var1, *ptr1, *ptr2;
float *ptr3;
int var2, *var4....do you know anything about data types?
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Join Date: Apr 2004
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Originally Posted by hail2dthief
The code you given has some error, are you sure you are giving the right code?
Anyway, the output should be:
x x
cause ptr1 has been assigned to the address of var2. When you output the value of *ptr1, it will refer to the value of that address.
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Originally Posted by hfick
i need to know the data types of variables such as:
double var1, *ptr1, *ptr2;
float *ptr3;
int var2, *var4....do you know anything about data types?
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Join Date: Aug 2004
Location: Minnesota
Posts: 18
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Rep Power: 5
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Newbie Poster
the next question asks says i am supposed to state the data type of each variable...
double var1, *ptr1, *ptr2;
float *ptr3;
int var2, *var4
double var1, *ptr1, *ptr2;
float *ptr3;
int var2, *var4
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