【C语言】求100到200之间的素数。

<pre name="code" class="cpp">方法一：#include <stdio.h>int main (){int n,i;int flag = 0;//标签int count = 0;//用来计数的printf("100到200之间的素数:\n");printf("\n");for(n=100; n<=200; n++){flag = 1;for(i=2; i<n; i++){if(n%i == 0) {flag = 0;}}if(flag != 0){printf("%d ",n);count++;if(count%7 == 0)//按每行7个数输出{printf("\n");}}}printf("\n");printf("count is %d\n",count);return 0;}方法二：#include <stdio.h>int main (){int n,i;for(n=101; n<200; n+=2){for(i=2; i<n; i++){if(n%i == 0)break;}if(i == n)//i不可能大于n{printf("%d ",n);}}printf("\n");return 0;}