Compilare: user.cpp: In function ‘int numar()’: user.cpp:64:16: warning: variable ‘semn’ set but not used [-Wunused-but-set-variable] int r = 0, semn = 1; ^ user.cpp: In function ‘int main()’: user.cpp:23:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &K); ^ user.cpp:28:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &X); ^ user.cpp:32:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^ user.cpp:36:20: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(S); p = 0; ^ /tmp/ccO6Up1g.o: In function `main': user.cpp:(.text.startup+0xf0): warning: the `gets' function is dangerous and should not be used.