Eroare de compilare: user.cpp: In function ‘long unsigned int pow(long unsigned int, long unsigned int)’: user.cpp:7:20: error: ‘c’ was not declared in this scope return pow(a,b-1)%c*a%p; ^ user.cpp:8:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:12:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%ld %ld",&a,&b); ^