Question

用DO WHILE 语句编程计算1*2+2*3+3*4+.......+99*100的值 谢谢.....急急急急!!!!

Answer 1

int sum=0;//总记
int a=1;//变量1；
int b=2;//变量2；
for(a=1;a<=99;a++){
sum+=a*b;
b++;
}
Response.Write(sum.ToString());
//写了个for循环的，看的懂，对你应该有点帮助

Answer 2

最简单的：

int i=1,sum=0;
do
{
sum+=(i++)*(i+1);
}while(i<100);

至于如何输出结果值sum就看你用什么语言了

Answer 3

public class lianxi2 {
public static void main(String agrs[]) {
int sum = 0;
int sum1 = 0;
int sum2 = 0;
int i=1;
while(i<101){

sum+=i;
i++;
}

System.out.println(sum);
System.out.println("+++++++++++++++++++++");

do{

sum1+=i;
i++;

}while(i<101);
System.out.println(sum1);
System.out.println("+++++++++++++++++++++");

for(i=1;i<101;i++){
sum2+=i;
}
System.out.println(sum2);
System.out.println("+++++++++++++++++++++");
}

}