what is the difference between these initializations?
Char a[]=”string”;
Char *p=”literal”;
Does *p++ increment p, or what it points to?
- 4 Answers
- 7108 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / bee
logically, both are treated as array of characters(i.e.
string) but....
1) a is an array of characters(a string)
2) p is a pointer to an array of characters
the statement char *p = "literal" is equivalent to
char j[] = "literal"
char *p = j;
3) *p++ can be seen as *(p++)....
this is so because '++' has higher recedence over '*'
operator. so, it increments address by 1 unit and prints
the corresponding value value
| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / gaurav
I am totally satisfied with your above explanation except
last one.
i.e. Char *p="literal";
So, i want to mention yes this will work.
Explanation: *p++.
Here we have post increment.
Postfix increment/decrement have high precedence, but the
actual increment or decrement of the operand is delayed (to
be accomplished sometime before the statement completes
execution).
value of printf("\nstr=%c\n",*p++) will be 'l', but before
complete execution of this statement p will point to string
"iteral" as p got incremented.
| Is This Answer Correct ? | 3 Yes | 1 No |
surely there is some difference.....
here 'a' is represented as array in which string gets stored
in consecutive locations......
p is a pointer variable where string is initilized... so in
p the base address of "literal " will get stored......
*p++ increments 'p' , but pertaining to some conditions.....
++ has more precedence than * , so first it will increment
the address and correspondingly it will show the value as *
precedes..... so after the increment the p points to 'i'...
thank u
| Is This Answer Correct ? | 5 Yes | 5 No |
Answer / koti
Actually char a[ ]="string" in this scenario string constant is stored in read-only memory section and also stack section.in this case you can modify the string constant.that modifications are happened in stack section .so here
*a ++ men's
1 ) a is pointing to base address of string constant .
2 ) *a men's inside content that is 's'.
3 ) *a ++ men's incrementing the asci value of 's'. After that you can print this array like
Printf("%s",a);
O/P : ttring.
Coming to the *p ="literal" this scenario
1 ) *p is stored in stack section why because it is auto variable.
2 ) "literal" this string constant is stored in read-only memory section.
3 ) P is pointing to string constant Base addres
Here *p++ men's you are training to change read only memory section contact. so it is an error why because
You can't modified the read-only memory content.
Main difference is using arrays string constant is stored in both stack and read-only memory section.
Using pointers string constant is stored in read-only memory section only .
Thank you.
| Is This Answer Correct ? | 0 Yes | 0 No |
How can I write data files which can be read on other machines with different word size, byte order, or floating point formats?
Why is c still so popular?
what are enumerations in C
What is the difference between text and binary i/o?
Write a c program to enter a string of paragraph and replacing a particular word which is repeated in the paragraph by another word?
2 Answers ME, Synfusion, Wipro,
write a program to input 10 strings and compare without using strcmp() function. If the character of one string matches with the characters of another string , sort them and make it a single string ??? example:- str1="Aakash" st2="Himanshu" str="Uday" output:- Aakashimanshuday (please post the answer as quickly as possible)
Why void is used in c?
What is a structure member in c?
Explain what is the most efficient way to store flag values?
main() { int a=4,b=2; a=b<<a + b>>2; printf("%d", a); }
11 Answers HCL, Vector, Vector India, Vector Solutions, Wipro,
write a program in c language that uses function to locate and return the smallest and largest integers in an array,number and their position in the array. it should also find and return the range of the numbers , that is , the difference between the largest number and the smallest.
Write a factorial program using C.
C 
