Compilare: main.cpp: In function 'int main()': main.cpp:63:11: warning: unused variable 'x' [-Wunused-variable] int i,x,j; ^ main.cpp: In function 'int i32()': main.cpp:47:32: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,LEN,f); ^ main.cpp:55:32: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,LEN,f); ^ main.cpp: In function 'int main()': main.cpp:62:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("blackwater.out","w",stdout); ^