今天在看c++primer的时候,读到其中这样一段话: When we use an istream as a condition, the effect is to test the state of the stream. If the stream is validthat is, if it is still possible to read another input then the test succeeds. An istream becomes invalid when we…
有下面非常经典的一个字符串复制程序. test1.c #include <stdio.h> int main() { char str_t[]="This String comes from t";//初始化字符数组 char str_s[]="This is an empty string ";//初始化字符数组 char *t=str_t;//初始化字符指针 char *s=str_s;//初始化字符指针 while(*s++=*t++)//*的优先…
