c語言編程題:輸入三個數字字符，形成百位數，輸出百位數

{

unsigned int a = 0, b = 0, c = 0, d =0;

printf("Please input 3 numbers:\n");

scanf("%d %d %d",a,b,c);

d = a*100 + b * 10 + c;

printf("the last number is %d", d);

}