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How does strcpy() works in the code below. Why no Runtime Error ?
Can anyone explain how the following C code works ? Correct Answer : E Question : #include<stdio.h> #include <string.h> void main() { char string[14] = "i love coding"; char * pointer = string ; pointer += 7 ; strcpy(pointer,"programming"); printf("%s",string); } Options : A) i love B) i love coding C) Compilation Error D) programming E) i love programming F) Runtime Error
2 Réponses
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pointer - - > first index
pointer+=2 - - > 2nd index
pointer +=7 - - > 7th index (this is saying start from the 7th index)
strcpy(pointer,"programming"); the strcpy just copy the string to the contiguous memory which has been allocated and go beyond if need be, because it was not instructed not to
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Strcpy does not give warning or runtime error in C. Due to unchecked memory access in C the strcpy has no info about pointer that you have declared as in from which memory address location. It's better to use strncpy instead to avoid overlaps