Compilare: user.cpp: In function ‘int main()’: user.cpp:31:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0; i < strlen(q); ++i ){ ^ user.cpp:39:21: warning: unknown conversion type character 0xa in format [-Wformat=] scanf("%d%\n",&n); ^ user.cpp:43:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lit] = !v[lit]; ^ user.cpp:43:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lit] = !v[lit]; ^ user.cpp:23:15: warning: unused variable ‘j’ [-Wunused-variable] int n, i, j, s, t, d, k; ^ user.cpp:23:18: warning: unused variable ‘s’ [-Wunused-variable] int n, i, j, s, t, d, k; ^ user.cpp:23:21: warning: unused variable ‘t’ [-Wunused-variable] int n, i, j, s, t, d, k; ^ user.cpp:23:24: warning: unused variable ‘d’ [-Wunused-variable] int n, i, j, s, t, d, k; ^ user.cpp:23:27: warning: unused variable ‘k’ [-Wunused-variable] int n, i, j, s, t, d, k; ^ user.cpp: In function ‘bool f4()’: user.cpp:128:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] r = v[q[indi]]; ^ user.cpp: In function ‘int main()’: user.cpp:20:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bool.in","r",stdin); ^ user.cpp:21:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bool.out","w",stdout); ^ user.cpp:26:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(q,1500,stdin); ^ user.cpp:39:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%\n",&n); ^ user.cpp:41:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&lit); ^