Overwritten txt file in C

Question

My doubt is very basic:

How do I stop, whenever I write something in a file (txt), always start recording after the information that was already written there?

I mean, how do I not overwrite the contents of an archive that already had information inscribed?

Language C in the case

Answer 1

Just open the file with fopen in the way append:

FILE *file = fopen("meuarquivo.txt", "a");