Compilare: user.cpp: In function ‘int main()’: user.cpp:28:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0; i < strlen(q); ++i ) ^ user.cpp:24:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, t, d, k; ^ user.cpp:24:15: warning: unused variable ‘t’ [-Wunused-variable] int i, j, t, d, k; ^ user.cpp:24:18: warning: unused variable ‘d’ [-Wunused-variable] int i, j, t, d, k; ^ user.cpp:24:21: warning: unused variable ‘k’ [-Wunused-variable] int i, j, t, d, k; ^ 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("sumall.in","r",stdin); ^ user.cpp:22:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sumall.out","w",stdout); ^ user.cpp:27:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",q); ^