formule.cpp: In function 'int main()': formule.cpp:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result formule.cpp:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result formule.cpp: In function 'int eval()': formule.cpp:71: warning: 'rez' may be used uninitialized in this function