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I can't figure out this expression:
str + n
where char str[STRING_LENGTH] and int n.
I have worked a lot in Java and was assuming till now that it's concatenation of string and integer, which I doubt now.
What does it mean?
510
int is a primitive variable to store integer numbers. String is an object with methods that allow text manipulation. As others have responded, int is an integer number and string is a text. By adding integers 1 and 2, your result would be 3.
In C programming, a string is a sequence of characters terminated with a null character \0 . For example: char c[] = "c string"; When the compiler encounters a sequence of characters enclosed in the double quotation marks, it appends a null character \0 at the end by default.
itoa() Function to Convert an Integer to a String in C itoa() is a type casting function in C. This function converts an integer to a null-terminated string.
It's pointer arithmetic. For instance:
char* str = "hello";
printf("%s\n", str + 2);
Output: llo. Because str + 2 point to 2 elements after str, thus the first l.
88
str can be regarded as pointing to the memory address associated with a character sequence of length STRING_LENGTH. As such, c pointer arithmetic is being exploited in your statement str + n. What is is doing is pointing to the memory address of the nth character in the character sequence.
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