There are three conditions that I want to fill out.
The first line has written the code.
Second, res was used. By the way, where should I put the res++; code?
Please tell me the location. And
How do I make the code for the third condition?
<Code Created>
#include <stdio.h>
#include <math.h>
#define size 1000001
int num[size] = { 0, };
int main() {
int M, N, i, j, res = 0;
int tmp = 0;
for (i = 2; i < size; i++)
num[i] = i;
scanf_s("%d %d", &M, &N);
tmp = (int)sqrt(N);
for (i = 2; i <= tmp; i++) {
if (num[i] == 0)
continue;
else {
for (j = i + 1; j <= N; j++) {
if (num[j] == 0)
continue;
if (num[j] % i == 0)
num[j] = 0;
}
}
}
for (i = M; i <= N; i++) {
if (num[i] != 0)
printf("%d", i);
}
printf("\n%d", res);
return 0;
}
I think it would be better to change the variable name. For example:
int N, M;
scanf_s("%d %d", &N, &M);
printf("%d", N + M);
When writing a short code on your own like "?You can see that the variable means ~," but as a group (especially when asking questions), it is not readable and it is annoying to answer. Please refer to the code below.
#include <stdio.h>
int main() {
int n, prime_count = 0, index = 0, arr[100];
scanf_s("%d", &n);
for (int i=2; i <= n; i++) {
int count = 0;
for (int j=1; j <= i; j++) {
if (i % j == 0) {
count++;
}
}
if (count == 2) {
arr[prime_count] = i;
prime_count++;
printf("%d ", i); //1
}
}
printf("\n"); //2
printf("%d\n", prime_count); //2
int min = arr[0], max = arr[0];
for (int i=0; i < prime_count; i++) {
if (arr[i] < min) {
min = arr[i];
}
if (arr[i] > max) {
max = arr[i];
}
}
printf("%d %d %d", min, max, min + max); //3
return 0;
}
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