Compilare: main.cpp: In function 'int main()': main.cpp:28:123: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("damesah.in","r",stdin),freopen("damesah.out","w",stdout),scanf("%d",&n),A(0),fwrite(r,1,o,stdout),printf("%d",m); ^ main.cpp:28:123: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:28:123: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]