Compilare: user.cpp: In function ‘void desc(int)’: user.cpp:9:9: warning: variable ‘orig’ set but not used [-Wunused-but-set-variable] int orig, d, cnt, lim; ^ user.cpp: In function ‘int main()’: user.cpp:40:22: warning: NULL used in arithmetic [-Wpointer-arith] while(s[p] != NULL) { ^ user.cpp:31:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("exp.in", "r", stdin); ^ user.cpp:32:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("exp.out", "w", stdout); ^ user.cpp:35:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &n, &m); ^ user.cpp:37:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^