AP
str_val += std::to_string(matrix[0][i]);
Size: a a a
AP
str_val += std::to_string(matrix[0][i]);
Б
AP
std::string str_val;
Б
РБ
TS
int i = 0:
{
int i = 1;
}AP
int i = 0:
{
int i = 1;
}TS
AP
YK
str_val += std::to_string(matrix[0][i]);
std::stringstream
AP
AP
AP
YK
YK
AP
AP
AP
TS