Eroare de compilare: user.cpp: In function ‘void add(std::string&, std::string)’: user.cpp:247:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0;i<s1.length()-1;i++) ^ user.cpp:203:9: warning: unused variable ‘firstNr’ [-Wunused-variable] int firstNr = getInt(s1.at(0)); ^ user.cpp: In function ‘void longTest()’: user.cpp:303:17: error: invalid types ‘std::string [20000000] {aka std::basic_string<char> [20000000]}[double]’ for array subscript length[k].clear(); ^ user.cpp:304:17: error: invalid types ‘std::string [20000000] {aka std::basic_string<char> [20000000]}[double]’ for array subscript length[k].append(length[k-1]); ^ user.cpp:304:36: error: invalid types ‘std::string [20000000] {aka std::basic_string<char> [20000000]}[double]’ for array subscript length[k].append(length[k-1]); ^ user.cpp:305:21: error: invalid types ‘std::string [20000000] {aka std::basic_string<char> [20000000]}[double]’ for array subscript add(length[k], length[k-2]); ^ user.cpp:305:34: error: invalid types ‘std::string [20000000] {aka std::basic_string<char> [20000000]}[double]’ for array subscript add(length[k], length[k-2]); ^ user.cpp:307:25: error: invalid types ‘std::string [20000000] {aka std::basic_string<char> [20000000]}[double]’ for array subscript add(sum,length[k]); ^ user.cpp:312:27: error: invalid types ‘std::string [20000000] {aka std::basic_string<char> [20000000]}[double]’ for array subscript Substract(sum,length[k]); ^ user.cpp: In function ‘void solve()’: user.cpp:353:40: error: invalid types ‘std::string [20000000] {aka std::basic_string<char> [20000000]}[double]’ for array subscript if(biggerOrEqual(length[k-2],x,true)) ^ user.cpp:360:39: error: invalid types ‘std::string [20000000] {aka std::basic_string<char> [20000000]}[double]’ for array subscript Substract(x,length[k-1]); ^ user.cpp: In function ‘std::string getString(int)’: user.cpp:48:1: warning: control reaches end of non-void function [-Wreturn-type] } ^