Compilare: user.cpp: In function ‘int main()’: user.cpp:79:26: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[260]’ [-Wformat=] scanf("%s\n", &s1); ^ user.cpp:80:26: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[260]’ [-Wformat=] scanf("%s\n", &s2); ^ user.cpp:81:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < strlen(s1); ++ i) ^ user.cpp:88:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < strlen(s2); ++ i) ^ user.cpp:69:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("logic.in", "r", stdin); ^ user.cpp:70:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("logic.out","w", stdout); ^ user.cpp:71:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:79:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", &s1); ^ user.cpp:80:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", &s2); ^ user.cpp: In function ‘int fact2(char*, int)’: user.cpp:64:17: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] return semn * val; ^ user.cpp:64:17: warning: ‘semn’ may be used uninitialized in this function [-Wmaybe-uninitialized]