Discussion :: Const
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Point out the error in the program.
#include#define MAX 128 int main() { char mybuf[] = "Fresher"; char yourbuf[] = "GATE"; char const *ptr = mybuf; *ptr = 'a'; ptr = yourbuf; return 0; }
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A.
Error: cannot convert ptr const value |
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B.
Error: unknown pointer conversion |
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C.
No error |
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D.
None of above |
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Answer : Option A
Explanation :
Step 1: char mybuf[] = "India"; The variable mybuff is declared as an array of characters and initialized with string "India".
Step 2: char yourbuf[] = "BIX"; The variable yourbuf is declared as an array of characters and initialized with string "BIX".
Step 3: char const *ptr = mybuf; Here, ptr is a constant pointer, which points at a char.
The value at which ptr it points is a constant; it will be an error to modify the pointed character; There will not be any error to modify the pointer itself.
Step 4: *ptr = 'a'; Here, we are changing the value of ptr, this will result in the error "cannot modify a const object".
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