ecuatii.cpp: In function 'void calcul(char*, int&, int&)': ecuatii.cpp:20: warning: NULL used in arithmetic ecuatii.cpp:55: warning: NULL used in arithmetic ecuatii.cpp: In function 'int main()': ecuatii.cpp:92: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[300]' ecuatii.cpp:88: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ecuatii.cpp:89: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ecuatii.cpp:90: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ecuatii.cpp:92: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result