給您參考 (還是比較喜歡用 basic ^^)
#include <stdio.h>
#include <conio.h>
void main()
{
unsigned int c1, c2;
c2=0;
do {
while (!kbhit());
c1 = getch();
if(c1>=48 && c1<=57){
c1=c1-48;
c2=c2*10+c1;
printf("*");
}
} while(c1!=13);
printf("\nPass word is %d\n",c2);
system("PAUSE");
}
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