一、N-S流程图；

二、运行结果；

三、源代码；

# define _CRT_SECURE_NO_WARNINGS
# include <stdio.h>
# include <math.h>int main()
{//初始化变量值；int i = 0;int j = 0;int n = 0;int a[101] = { 0 };//循环填充数组a的值；for (i = 1; i <= 100; i++){//循环填充；a[i] = i;//去掉a[1];a[1] = 0;}//循环判断素数；for (i = 2; i <= sqrt(100); i++){//内层循环判断；for (j = i + 1; j <= 100; j++){//判断是否已经判断过了；if (a[i] != 0 && a[j] != 0){//判断素数；if (a[j] % a[i] == 0){//素数替换为0；a[j] = 0;}}}}//换行;printf("\n");//提示；printf("100以内的素数为：\n");//循环输出素数；for (i = 2, n = 0; i <= 100; i++){//判断不为0打印；if (a[i] != 0){//打印结果；printf("%5d", a[i]);n++;}//一行打印10个；if (n == 10){//换行；printf("\n");//初始化n的值；n = 0;}}//换行；printf("\n");return 0;
}