字符串的拷贝

对字符串拷贝函数的优化

void stringcopy(char* from,char* to){int i=0;for(i=0;i<strlen(from);i++){*(to+i) = *(from+i);}to[i]='\0';}void stringcopy2(char* from,char* to){int i=0;for(;*from!='\0';){*to++ = *from++;}*to='\0';}void stringcopy3(char* from,char* to){while( (*to = *from)!='\0' ){from++;to++;}}void stringcopy4(char* from,char* to){while( (*to++ = *from++)!='\0' ){;}}void stringcopy5(char* from,char* to){while( (*to++ = *from++) );}