fotbal1.cpp: In function 'void euler(int, int)': fotbal1.cpp:19: warning: comparison between signed and unsigned integer expressions fotbal1.cpp:26: warning: comparison between signed and unsigned integer expressions fotbal1.cpp: In function 'void read(int&)': fotbal1.cpp:38: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result fotbal1.cpp:46: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result fotbal1.cpp: In function 'int main()': fotbal1.cpp:52: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result fotbal1.cpp:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result fotbal1.cpp:56: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result