cifru.cpp: In function 'int main()': cifru.cpp:9: warning: unused variable 'm1' cifru.cpp:9: warning: unused variable 'm2' cifru.cpp:10: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result cifru.cpp:13: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result cifru.cpp:9: warning: 'nrr' may be used uninitialized in this function