Compilare: user.cpp: In function ‘int main()’: user.cpp:25:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( j = 0; j < strlen(q) - 1; ++j ){ ^ user.cpp:17:18: warning: unused variable ‘s’ [-Wunused-variable] int n, i, j, s, t, d, k, ma, ok; ^ user.cpp:17:21: warning: unused variable ‘t’ [-Wunused-variable] int n, i, j, s, t, d, k, ma, ok; ^ user.cpp:17:24: warning: unused variable ‘d’ [-Wunused-variable] int n, i, j, s, t, d, k, ma, ok; ^ user.cpp:17:30: warning: unused variable ‘ma’ [-Wunused-variable] int n, i, j, s, t, d, k, ma, ok; ^ user.cpp:17:34: warning: unused variable ‘ok’ [-Wunused-variable] int n, i, j, s, t, d, k, ma, ok; ^ user.cpp:14:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("editor.in","r",stdin); ^ user.cpp:15:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("editor.out","w",stdout); ^ user.cpp:20:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:24:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",q); ^