C++ primer 习题1.9-1.13

#include <iostream>

int main()

{

1.9 /* int sum = 0;

for(int i = -100;i <= 100;i++)

sum +=i;

std::cout << sum;

1.10 {* for() 50-100 natural number sum *}

int sum = 0 ;

for(int i =50 ;i <=100; i++)

sum += i;

std::cout << sum <<std::endl;

1.10 {* while 50-100 natural number sum *}

int sumA =0, i=50;

while(i <= 100)

{

sumA += i ;

i++;

}

std::cout << sumA <<std::endl;

1.11 // {* while output 10 -0*}

int i=10;

while (0 <=i)

{

std::cout << i <<std::endl;

i--;

}

1.11 // {* for() output 10-0 *}

for(int i=10 ; 0 <=i ; i--)

std::cout << i << std::endl;

}

posted on 2010-05-11 19:14 Archer 阅读(242) 评论(0) 编辑收藏引用所属分类: C语言的学习

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