Compilare: main.cpp: In function 'void construct()': main.cpp:120:18: warning: unused variable 'ch' [-Wunused-variable] 120 | char ch = s[dr]; | ^~ main.cpp: In function 'int main()': main.cpp:162:18: warning: unused variable 'ch' [-Wunused-variable] 162 | char ch = s[i]; | ^~ main.cpp:158:14: warning: unused variable 'ch' [-Wunused-variable] 158 | char ch = s[i]; | ^~ main.cpp:153:9: warning: unused variable 'n' [-Wunused-variable] 153 | int n = str.size(); | ^