Question

c语言求数列前n项和

c语言求数列前n项和

Answer 1

main(){
int i,n,s=1,f[]={0,1,1};
printf("Please input the number of terms:");
scanf("%d",&n);
if(n==0){s=0;f[2]=0;}
for (i=2;i<=n;i++)
{ f[2]=f[1]+f[0];f[0]=f[1];f[1]=f[2];
s+=f[1];
}
printf("f(%i)=%i\n",n,f[2]);
printf("Sum(%i)=%i\n",n,s);
scanf("%d");
}