Compilare: main.cpp: In function 'BigNr operator+(BigNr, const BigNr&)': main.cpp:142:23: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 142 | if (carry = res.big_nr[i] >= BASE) | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'BigNr operator-(BigNr, const BigNr&)': main.cpp:155:23: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 155 | if (carry = res.big_nr[i] < 0) | ~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:243:20: warning: unused variable 'i' [-Wunused-variable] 243 | static int i{}; | ^ main.cpp: At global scope: main.cpp:243:20: warning: 'i' defined but not used [-Wunused-variable]