void myprintf (char *, ...);
int length;
void main () {
myprintf ("abcdefg%h%%%dabcde%c", -123, 'm');
}
void myprintf (char *chars, ...) {
int i = 0;
int anum=0, anumcopy = 0, yu=0, yulen=0;
int yuss[9];
int *yus=yuss;
int length;
int position = 0;
int ssposi = 0;
char a;
length = 0;
a = chars[0];
while (a != '\0') { //取得格式控制字符串的长度;
length++;
a = chars[length];
}
while (i < length) {
if (*(char *)(0x0c3c0194+i) == '%') { //对%的识别;
if (*(char *)(0x0c3c0194+i+1)=='c') { //识别%c;
*(char far *)(0xb8000000+160*10+position) = *(int *)(_BP+6+ssposi);
i+=2;
ssposi+=2;
} else if (*(char *)(0x0c3c0194+i+1)=='d') { //识别%d;
anum = *(int *)(_BP+6+ssposi);
anumcopy = anum;
if ((anumcopy&32768) == 32768) {
anum = (~anum);
anum+=1;
while (anum != 0) {
yu = anum%10;
*(yus+yulen) = yu;
anum /= 10;
yulen++;
}
yulen = yulen-1;
*
王爽《汇编语言》探究实验五——自己实现一个printf函数
最新推荐文章于 2024-11-29 00:15:00 发布