c语言dowhile编程题,do while循环问题

do while循环问题

源程序如下：

#include

void main()

{

int i,j,n;

long int sum=0,temp;

char k;

do

{

{

printf("Please input a number to n:\n");

scanf("%d",&n);

if(n<1)

{

printf("The n must be no less than 1!\n");

break;

}

for(i=1;i<=n;i++)

{

temp=0;

for(j=1;j<=i;j++)

temp+=j;

sum+=temp;

}

printf("The sum of the sequence(%d) is %d\n",n,sum);

scanf("%c",&k);

}while(k='y')

}

请问这个程序为什么不能执行printf("The sum of the sequence(%d) is %d\n",n,sum);语句后的scanf("%c",&k);

do while 循环不能实现？该程序在ｖｃ下调试通过，但运行有问题