Using strlen() in C.

Question

I have this code:

char input[100];

printf("%s", "Enter something: ");
fgets(input, 100, stdin);

int n = strlen(input);
printf("%d", n);

But, if I write for example the word memo, the output will be 5, why? it should be 4. I solved it doing this:

printf("%d", n - 1); // Now is 4 if you use memo as input.

But I'm not sure if this is the right solution, why if I write memo as input, returns me 5 instead 4? I tried the same function in C++, and I don't have this problem.

Answer 1

fgets() inputs a trailing newline character. You should use strcspn() to fix this:

input[strcspn(input, "\n")] = 0;