ferma.cpp: In function 'int main()': ferma.cpp:11: warning: unused variable 'x' ferma.cpp:12: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result ferma.cpp:14: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result ferma.cpp:11: warning: 'j' may be used uninitialized in this function