covor1.cpp:2: warning: ISO C++ forbids declaration of 'main' with no type covor1.cpp: In function 'int main()': covor1.cpp:6: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result covor1.cpp:7: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result