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 UWA week 36 (2nd semester, mid-semester break) ↓
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helpful
2:04pm Wed 7th Sep, ANONYMOUS

hello, i have a question about the use of pointers in strtol, strtol(char[], **endptr, int) takes: a string input (which it attempts to convert into an int), a pointer to a (previously declared) empty pointer, which it uses to return a pointer to the first element in the string that was not able to be converted to an int an int for what base we want it to perform the conversion in an example implementation is: char* endptr; char string[] = "12345n"; int i = strtol(string, &endptr, 10); this sets the value of i to 12345, and endptr now points to a string "n" I don't understand why the second parameter has to be a pointer to a pointer; why can we not just pass endptr to strtol instead of passing &endptr, the address of the pointer? where does this pointer-ception end???

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