好久没有来了，大家100个倒数相加做的怎么样了。。。
程序代码：第一种
#include < iostream >
#include < cstdlib >
using namespace std;
int main ( )
{
const int N = 100;
double sum = 0.0;
int x = 1;
do sum += 1.0 / x++;
while ( x <= N );
cout << " The sum of the first" << N << " reciprocals is " << sum;
第二种：
//迭代意指反复执行一条或多条语句，直至某个条件为真、
#include < iostream >
#include < cstdlib >
using namespace std;
int main ( )
{
const int N = 100;
double sum = 0.0;
int x = 1;
repeat: sum += 1.0 / x++;
if ( x < N )
goto repeat;
cout << "The sum of the first " << N << " reciprocals is " << sum;
system ( "pause" );
}
第三种：
#include < iostream >
#include < cstdlib >
using namespace std;
int main ( )
{
const int N = 100;
double sum = 0.0;
int x = 1;
while ( x <= N )
sum += 1.0 / x++;
cout << "The sum of the first " << N << " reciprocals is " << sum;
system ( "pause" );
return 0;
}
第四种：
#include < iostream >
#include < cstdlib >
using namespace std;
int main ( )
{
const int N = 100;
double sum = 0.0;
for ( int x = 1; x <=N; x++ )
sum += 1.0 / x;
cout << "The sum of the first " << N << " reciprocal is " << sum << endl;
system ( "pause" );
return 0;
}
再发个漂亮的图案玩玩：
#include < iostream >
#include < cstdlib >
using namespace std;
int main ( )
{
const int N = 10;
for ( int i = 0; i < N; i++ )
{
for ( int j = 0; j < 2 * N; j++ )
if ( j < N -i || j > N + i ) cout << " ";
else cout << "*";
cout <<"\n";
}
system ( "pause" );
return 0;
}
system ( "pause" );
return 0;
}
嘿嘿
鲜花掌声~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 楼 我怎么说你呢~~~~~~~~~~