Compilare: user.cpp: In function ‘int main()’: user.cpp:124:24: warning: unused variable ‘k’ [-Wunused-variable] int n = nextnum(), k = nextnum(); ^ user.cpp:130:9: warning: unused variable ‘max1’ [-Wunused-variable] int max1 = 1, max2 = 2; ^~~~ user.cpp:130:19: warning: unused variable ‘max2’ [-Wunused-variable] int max1 = 1, max2 = 2; ^~~~ user.cpp: In function ‘char nextch()’: user.cpp:11:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fi); ^