#includevoid fac(int s[]){ int i=0,j=1,t; for(t=2;t<20;t++) { s[t]=s[i++]+s[j++]; }}int main(){ int s[20]={1,1},i,sum=0; fac(s); for(i=0;i<20;i++) sum+=s[i]; printf("sum=%d\n",sum); return 0;}