Compilare: main.cpp: In function 'int main()': main.cpp:12:12: warning: unused variable 'j' [-Wunused-variable] int i, j, l, w, n; ^ main.cpp:12:15: warning: unused variable 'l' [-Wunused-variable] int i, j, l, w, n; ^ main.cpp:10:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("texttrim.in", "r", stdin); ^ main.cpp:11:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("texttrim.out", "w", stdout); ^ main.cpp:16:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &v[i]); ^ main.cpp:31:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &w); ^