tabel.cpp: In function 'int main()': tabel.cpp:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result tabel.cpp:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result tabel.cpp:43: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result tabel.cpp:51: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result tabel.cpp:53: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result tabel.cpp: In function 'void lin(int, int)': tabel.cpp:4: warning: 'c' may be used uninitialized in this function tabel.cpp: In function 'void col(int, int)': tabel.cpp:22: warning: 'l' may be used uninitialized in this function