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2016-11-09
#include<stdio.h>
int main(){
?int n,sum=0;
?printf("請輸入n的值：");
?scanf("%d",&n);
?for(int i=1;i<=n;i++){
??sum+=i;?
?}
?printf("輸出從1加到n的和為：%d\n",sum);
?return 0;
}
2016-09-26
#include<stdio.h>
int main(){
int a=1,sum=0;
if(a<=n){
while(a){
sum=a+sum;
a=a+1;
}
}
return 0;
}