ksecv.cpp: In function 'int read()': ksecv.cpp:11: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result ksecv.cpp:15: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result ksecv.cpp:20: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result ksecv.cpp: In function 'int main()': ksecv.cpp:51: warning: comparison between signed and unsigned integer expressions ksecv.cpp:53: warning: comparison between signed and unsigned integer expressions