Compilare: user.cpp: In function ‘int main()’: user.cpp:51:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[tip][x] += (v[tip][x + 1] - v[tip][x]) - (v[tip][x] - v[tip][x - 1]); ^ user.cpp:51:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[tip][x] += (v[tip][x + 1] - v[tip][x]) - (v[tip][x] - v[tip][x - 1]); ^ user.cpp:51:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[tip][x] += (v[tip][x + 1] - v[tip][x]) - (v[tip][x] - v[tip][x - 1]); ^ user.cpp:51:58: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[tip][x] += (v[tip][x + 1] - v[tip][x]) - (v[tip][x] - v[tip][x - 1]); ^ user.cpp:51:70: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[tip][x] += (v[tip][x + 1] - v[tip][x]) - (v[tip][x] - v[tip][x - 1]); ^ user.cpp:37:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d", &len[0], &len[1], &s); ^ user.cpp:40:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lld", &v[i][j]); ^ user.cpp:44:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &q); ^ user.cpp:47:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int x, y; fscanf(fi,"%d%d", &x, &y); ^