Compilare: user.cpp: In function ‘int main()’: user.cpp:150:31: warning: unknown conversion type character 0x20 in format [-Wformat=] fscanf(f, "% d", &mat[i][j]); ^ user.cpp:150:31: warning: too many arguments for format [-Wformat-extra-args] user.cpp:141:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:142:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &m); ^ user.cpp:150:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "% d", &mat[i][j]); ^