char myName[30] = {0};
ifs.getline(myName, 30, '\n'); //读取某文件内短文本的一行
//假设myName = "allyli"
int length = sizeof(myName); //结果为30
int length_tr = strlen(MyName); //结果为6
char myName[30] = {0};
ifs.getline(myName, 30, '\n'); //读取某文件内短文本的一行
//假设myName = "allyli"
int length = sizeof(myName); //结果为30
int length_tr = strlen(MyName); //结果为6