Compilare: main.cpp: In function 'Matrix operator*(const Matrix&, const Matrix&)': main.cpp:27:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=0;i<2;++i) ^~~ main.cpp:31:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return C; ^~~~~~ main.cpp: In function 'int main()': main.cpp:43:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.in","r",stdin); ^ main.cpp:44:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.out","w",stdout); ^ main.cpp:46:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^