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2018-10-31
源自:C語言入門 4-12
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#include<stdio.h>int main(){?int i,n,x;?scanf("%d",&n);?for(i=1;i<=n;i++)?{??if(i<=(n+1)/2)??{???for(x=(n-1)/2;x>=i;x--)???{????printf(" ");???}???for(x=1;x<=2*i-1;x++)???{????printf("*");???}???printf("\n");??}??else??{???for(x=1;x<=i-(n+1)/2;x++)???{????printf(" ");???}???for(x=(n-i+1)*2-1;x>=1;x--)???{????printf("*");???}???printf("\n");??}?}?return 0;}
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#include<stdio.h>int fenzi(int a){??? if(a == 1)??? return 2;??? else if(a == 2)??? return 3;??? else??? return fenzi(a - 1)+fenzi(a - 2);}
int main(){??? int n, a;??? float sum;??? sum = 0;??? scanf("%d", &n);??? for(a = 1; a <= n; a++)??? {??????? if(a == 1)??????? {??????????? sum += 1.0 * fenzi(a) / 1;??????? }??????? else??????? {??????????? sum += 1.0 * fenzi(a) / fenzi(a - 1);??????? }??? }??? printf("%.2f", sum);??? return 0;}
像這個題我打出代碼來,答案錯誤
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2018-10-31
#include<stdio.h>
int main()
{
?int i,n,x;
?scanf("%d",&n);
?for(i=1;i<=n;i++)
?{
??if(i<=(n+1)/2)
??{
???for(x=(n-1)/2;x>=i;x--)
???{
????printf(" ");
???}
???for(x=1;x<=2*i-1;x++)
???{
????printf("*");
???}
???printf("\n");
??}
??else
??{
???for(x=1;x<=i-(n+1)/2;x++)
???{
????printf(" ");
???}
???for(x=(n-i+1)*2-1;x>=1;x--)
???{
????printf("*");
???}
???printf("\n");
??}
?}
?return 0;
}
2018-11-19
#include<stdio.h>
int fenzi(int a)
{
??? if(a == 1)
??? return 2;
??? else if(a == 2)
??? return 3;
??? else
??? return fenzi(a - 1)+fenzi(a - 2);
}
int main()
{
??? int n, a;
??? float sum;
??? sum = 0;
??? scanf("%d", &n);
??? for(a = 1; a <= n; a++)
??? {
??????? if(a == 1)
??????? {
??????????? sum += 1.0 * fenzi(a) / 1;
??????? }
??????? else
??????? {
??????????? sum += 1.0 * fenzi(a) / fenzi(a - 1);
??????? }
??? }
??? printf("%.2f", sum);
??? return 0;
}
2018-11-02
2018-11-02
謝謝大佬