64 lines
1.1 KiB
C
64 lines
1.1 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <math.h>
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int is_sushu(int x) //判断一个数是否是素数
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{
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if (x <= 1)
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return 0;
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for (int a = 2; a <= sqrt(x); a++)
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{
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if (x % a == 0)
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{
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return 0;
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}
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}
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return 1;
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}
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int num_sushuhe(int x, int y) //计算区间[x,y]内素数的和
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{
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int sum = 0;
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for (int e = x; e <= y; e++)
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{
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if (is_sushu(e))
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{
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sum += e;
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}
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}
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return sum;
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}
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int main()
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{
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int m, n;
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printf("请输入两个正整数m和n:");
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scanf("%d %d", &m, &n);
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if (n > m) // 确保m <= n
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{
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int temp = m;
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m = n;
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n = temp;
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}
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if (n < 1 || m < 1)
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{
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printf("输入错误，请重新输入！\n");
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}
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else
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{
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printf("素数列表: ");
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for (int x = n; x <= m; x++)
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{
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if (is_sushu(x))
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{
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printf("%d ", x);
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}
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}
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printf("\n素数和: %d\n", num_sushuhe(n, m));
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}
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return 0;
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}
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