Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:14:2: error: ‘dinuin’ was not declared in this scope dinuin = fopen("sum.in", "r"); ^ user.cpp:15:2: error: ‘dinuout’ was not declared in this scope dinuout = fopen("sum.out", "w"); ^ user.cpp:26:30: error: ‘e’ was not declared in this scope fprintf(dinuout, "%lld\n", e[x] * 2 * x); ^ user.cpp:12:12: warning: unused variable ‘a’ [-Wunused-variable] int i, j, a, b, c; ^ user.cpp:12:15: warning: unused variable ‘b’ [-Wunused-variable] int i, j, a, b, c; ^ user.cpp:12:18: warning: unused variable ‘c’ [-Wunused-variable] int i, j, a, b, c; ^