Compilare: user.cpp: In function ‘int main()’: user.cpp:58:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(int i = n - 1;i;i--) ^~~ user.cpp:60:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ return 0; ^~~~~~ user.cpp:37:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("permsplit.in", "r", stdin); ^ user.cpp:38:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("permsplit.out", "w", stdout); ^ user.cpp: In function ‘char next()’: user.cpp:23:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, 1, BUF, stdin), pos = 0; ^