strcpy:字串复制
原型:char *strcpy(char *dest, char *src);
strncpy:字串复制
原型:char * strncpy(char *dest, char *src, size_t
n);
区别范例:
char ch[7] = "steven";
char ch1[5];
strcpy(ch1, ch); //出错,给定长度不够,导致内存泄露
strncpy(ch1, ch, sizeof(ch1)); //正确,动态计算长度