摘要：#include int main() { int n,sum; while(scanf("%d",&n)!=EOF){ sum=0; while(n!=1){ if(n%2==0) n=n/2; else ... 阅读全文

摘要：#include int main() { int n,i; float sum; while(scanf("%d",&n)!=EOF){ sum=0.0; for(i=1;i<=n;i++){ if(i%2==0) sum=sum-(1.0/i); else sum=sum+(1.0/i);... 阅读全文

摘要：#include int main() { int n,i,j,sum; while(scanf("%d",&n)!=EOF){ sum=0; for(i=1;i<=n;i++){ for(j=1;j<=i;j++) sum+=j; } printf("%d\n",sum); } re... 阅读全文

摘要：#include int main() { int n,i,sum; while(scanf("%d",&n)!=EOF){ sum=0; for(i=1;i<=n;i++){ if(i%2==0) sum=sum-i; else sum=sum+i; } printf... 阅读全文

摘要：#include int main() { int n,i,sum; while(scanf("%d",&n)!=EOF){ sum=0; for(i=1;i<=n;i++) sum+=i; printf("%d\n",sum); } return 0; } 阅读全文