(23) : error C3861: “stoi”: 找不到标识符 (23) : error C3861: “stoi”: 找不到标识符 (28) : error C3861: “stoi”: 找不到标识符 (28) : error C3861: “stoi”: 找不到标识符 (32) : error C3861: “stoi”: 找不到标识符 (32) : error C3861: “stoi”: 找不到标识符