Question

用C语言编写一个程序，输出1到100中的质数

Answer 1

#include<stdio.h>
#include<windows.h>
int f(int n)
{if(n<2)return 0;<br>int i;<br>for(i=2;i<=n/2;i++)<br>if(n%i==0)<br>return 0;<br>return 1;<br>}
int main()
{int i;<br>for(i=1;i<=100;i++)<br>if(f(i))<br>printf("%5d",i);<br>system("pause"); <br>}

Answer 2

#include<stdio.h>
int zhishu(int n)
{if(n<2)return 0;<br _extended="true">int i;<br _extended="true">for(i=2;i<=n/2;i++)<br _extended="true">if(n%i==0)<br _extended="true"> {</p><p> return 0;<br _extended="true"> break;</p><p> }if(i>n/2) return 1;
}
void main()
{int i;<br _extended="true">for(i=1;i<=100;i++)<br _extended="true">if(zhishu(i))<br _extended="true">printf("%5d",i);<br _extended="true">}

Answer 3

#include<stdio.h>
int f(int n)
{
int i;
for(i=2;i<=n/2;i++)
if(n%i==0)
return 0;
return 1;
}
void main()
{
int i,count=0;
for(i=2;i<=100;i++)
{
if(f(i)==1)
{
printf(:%4d",i);
count++;
if(count%==0)
printf("\n");
}
}
printf("\n");
}