Compilare: user.cpp: In function ‘int main()’: user.cpp:10:9: warning: unused variable ‘m’ [-Wunused-variable] int n, m, x, i, j,ok, max, litere1[27],litere2[27]; ^ user.cpp:10:12: warning: unused variable ‘x’ [-Wunused-variable] int n, m, x, i, j,ok, max, litere1[27],litere2[27]; ^ user.cpp:10:24: warning: unused variable ‘max’ [-Wunused-variable] int n, m, x, i, j,ok, max, litere1[27],litere2[27]; ^ user.cpp:16:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^