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编程求 s=1!+2!+3!+ ...... +n! , n 由键盘输入,请将下面 for 语句改写成 while 语句实现同样功能。 for int i,n; long int p=1,sum=0; printf("input n:\n"); scanf("%d",&n); for(i=1;i<=n;i++) { p=p*i; sum=sum+p; } printf("sum=%d\n", sum); do...while int i,n; long int p= ,sum=0; printf("input n:\n"); scanf("%d",&n); i=1; do { ; sum=sum+p; ;} printf("sum=%d\n", sum);
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举一反三
【单选题】听力原文：M: I am pleased we've reached an agreement on the amount of materials. We just have a very tight budget. Thank you for your understanding. W: I' m glad you are happy. But please help us next time...
A.
Support
B.
Praise
C.
Complain
D.
Negotiate
【简答题】行使追索权的四个条件是什么?