Compilare: user.cpp: In function ‘int main()’: user.cpp:19:19: warning: suggest parentheses around comparison in operand of ‘!=’ [-Wparentheses] for(int i = 0; i < a[i] != 0; i++) ~~^~~~~~ user.cpp:20:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] sum += l[a[i]]; ^ user.cpp:28:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (sum1 + l[a[i]] > w - 3) ^ user.cpp:34:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] sum1 += l[a[i]]; ^ user.cpp:10:71: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("/home/mihai/Documents/C++/Texttrim/texttrim.in", "r", stdin); ^ user.cpp:11:73: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("/home/mihai/Documents/C++/Texttrim/texttrim.out", "w", stdout); ^ user.cpp:12:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf(" %d ", &l[' ']); ^ user.cpp:14:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf(" %d ", &l[i]); ^ user.cpp:15:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(a, NMAX, stdin); ^ user.cpp:16:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf(" %d ", &w); ^