Eroare de compilare: main.cpp: In function 'int main()': main.cpp:43:24: warning: array subscript has type 'char' [-Wchar-subscripts] coord.x += dx[d]; ^ main.cpp:44:24: warning: array subscript has type 'char' [-Wchar-subscripts] coord.y += dy[d]; ^ main.cpp:66:20: warning: array subscript has type 'char' [-Wchar-subscripts] val += dy[d] * coord.x; ^ main.cpp:70:25: error: 'abs' was not declared in this scope printf("%d" ,abs(val) - P/2 + 1); ^ main.cpp:70:25: note: suggested alternative: In file included from main.cpp:2:0: /usr/include/c++/6/cmath:103:5: note: 'std::abs' abs(_Tp __x) ^~~ main.cpp:11:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ape.in","r",stdin); ^ main.cpp:12:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ape.out","w",stdout); ^ main.cpp:18:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &P); ^ main.cpp:42:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &d); ^ Non zero exit status: 1