Compilare: user.cpp: In function ‘int main()’: user.cpp:30:35: warning: format ‘%c’ expects argument of type ‘char*’, but argument 3 has type ‘int*’ [-Wformat=] fscanf(fin, "%c", &mat[0][i]); ^ user.cpp:27:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d ", &n, &k); ^ user.cpp:30:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &mat[0][i]); ^