Compilare: main.cpp: In function 'int main()': main.cpp:9:9: warning: unused variable 'n' [-Wunused-variable] 9 | int n, i, j, cer, a, b, r, sum = 0, e; | ^ main.cpp:9:15: warning: unused variable 'j' [-Wunused-variable] 9 | int n, i, j, cer, a, b, r, sum = 0, e; | ^ main.cpp:9:29: warning: unused variable 'r' [-Wunused-variable] 9 | int n, i, j, cer, a, b, r, sum = 0, e; | ^