ferma1.cpp: In function 'int main()': ferma1.cpp:60: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ferma1.cpp:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ferma1.cpp:64: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ferma1.cpp:68: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ferma1.cpp:69: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result /usr/include/c++/4.4/bits/stl_algo.h: In function 'int check(int, int, int, int)': /usr/include/c++/4.4/bits/stl_algo.h:2193: warning: array subscript is above array bounds ferma1.cpp: In function 'int main()': ferma1.cpp:62: warning: 'l' may be used uninitialized in this function ferma1.cpp:62: warning: 'c' may be used uninitialized in this function ferma1.cpp:63: warning: 'cul' may be used uninitialized in this function