Compilare: main.cpp: In function 'void read(int&)': main.cpp:23:71: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(cursor == bsize) cursor = 0, fread(buffer, 1, bsize, stdin); ^ main.cpp:29:71: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(cursor == bsize) cursor = 0, fread(buffer, 1, bsize, stdin); ^ main.cpp: In function 'void read(ll&)': main.cpp:38:71: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(cursor == bsize) cursor = 0, fread(buffer, 1, bsize, stdin); ^ main.cpp:44:71: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(cursor == bsize) cursor = 0, fread(buffer, 1, bsize, stdin); ^ main.cpp: In function 'int main()': main.cpp:70:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("carray.in", "r", stdin); ^ main.cpp:71:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("carray.out", "w", stdout); ^ main.cpp:74:47: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] cursor = 0, fread(buffer, 1, bsize, stdin); ^