# include & ltstdio.h & gt
# include & ltmath.h & gt
作廢?主()
{
int?I,k,m,n;
int?count = 0;
Printf("請輸入求素數的上區間m的值:");
scanf("%d ",& ampm);
Printf("請輸入求質數的下區間n的值:");
scanf("%d ",& ampn);
for(I = m;我& lt= n;i++)
{
if(i==1)
繼續;
int?flag = 1;
for(k = 2;k & lt我;k++)
{
如果(i%k==0)
{
flag = 0;
打破;
}
}
if(flag==1)
{
printf("%-4d ",I);
count++;
}
if(計數%5==0)
printf(" \ n ");
}
if(count==0)
Printf("這個區間的質數是:0 \ n ");
}
運行結果: