Which of the following statements are correct about the C declarations given below ? char *p = "Honesty"; (a) There is no difference in the declarations and both serve the same purpose. (b) In both cases the '\o' will be added at the end of the string :Honesty" (c) The first statement is incorrect since ‘\o’ is not given in the string. (d) 'p' is a non-const pointer pointing to a non-const string, whereas ‘a’ is a const pointer pointing to a non-const string. Codes :
char a[ ] = "Honesty";
(b) and (d) are correct.
To determine which statements about the given C declarations are correct, let's analyze each declaration and the corresponding statements.
- Declaration Analysis:
char *p = "Honesty";
This statement creates a pointerpthat points to a string, which is essentially a pointer to the first character of the string "Honesty". The string is stored in a read-only memory area.char a[] = "Honesty";
This statement creates an arrayaof typecharand initializes it with the string "Honesty". The array is stored in writable memory, and a null character'\0'is automatically added at the end. The array size is determined by the length of the string plus one for the null character.
- Statement Verification:
- (a) There is no difference in the declarations and both serve the same purpose.
This is incorrect. The main difference is thatpis a pointer andais an array. The pointer can point to other strings, while the array name acts as a constant pointer and its contents can be modified. - (b) In both cases, the '\0' will be added at the end of the string "Honesty".
This is correct. The null terminator'\0'is automatically appended in both cases, either in the array or logically in the string literal for pointers. - (c) The first statement is incorrect since '\o' is not given in the string.
This is incorrect logic. The escape sequence is'\0'(not'\o'), representing the null character. The null character is assumed even if not explicitly written in string literals, making the statement invalid. - (d) 'p' is a non-const pointer pointing to a non-const string, whereas ‘a’ is a const pointer pointing to a non-const string.
This is correct.pis a pointer that can be made to point to different strings but points to a string constant initially. Conversely,ais an array, and its name acts as a constant pointer that cannot point elsewhere, although its contents can be modified.
- (a) There is no difference in the declarations and both serve the same purpose.
- Conclusion:
- The correct options are (b) and (d), as these interpretations accurately reflect the differences and properties of the
char *pandchar a[]declarations.
- The correct options are (b) and (d), as these interpretations accurately reflect the differences and properties of the
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