Eroare de compilare: user.c: In function ‘main’: user.c:18:2: warning: implicit declaration of function ‘fopen_s’ [-Wimplicit-function-declaration] fopen_s(&in, "fractii.in", "r"); ^ user.c:20:2: warning: implicit declaration of function ‘fscanf_s’ [-Wimplicit-function-declaration] fscanf_s(in, "%d", &n); ^ user.c:37:2: warning: implicit declaration of function ‘fprintf_s’ [-Wimplicit-function-declaration] fprintf_s(out, "%d", counter); ^ /tmp/ccYTgnpS.o: In function `main': user.c:(.text.startup+0x24): undefined reference to `fopen_s' user.c:(.text.startup+0x40): undefined reference to `fscanf_s' user.c:(.text.startup+0xd4): undefined reference to `fopen_s' user.c:(.text.startup+0xec): undefined reference to `fprintf_s' collect2: error: ld returned 1 exit status