prieten.cpp: In function 'int main()': prieten.cpp:12: warning: unused variable 'n' prieten.cpp:12: warning: unused variable 'e' prieten.cpp:12: warning: unused variable 'p' prieten.cpp:12: warning: unused variable 'x' prieten.cpp:12: warning: unused variable 'y' prieten.cpp:12: warning: unused variable 'z' prieten.cpp:12: warning: unused variable 'rest' prieten.cpp:15: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result