nrcuv.cpp: In function 'int main()': nrcuv.cpp:17: warning: suggest parentheses around '&&' within '||' nrcuv.cpp:9: warning: unused variable 'i' nrcuv.cpp:9: warning: unused variable 'j' nrcuv.cpp:9: warning: unused variable 'nn' nrcuv.cpp:11: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result nrcuv.cpp:14: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result