程序:
1 #include<stdio.h> 2 3 int main() { 4 int i,n,s = 1; 5 scanf("%d",&n); 6 for(i=1; i<n; i++) { 7 s = (s+1)*2; 8 } 9 printf("%d",s); 10 }
程序:
1 #include<stdio.h> 2 3 int main() { 4 int i,n,s = 1; 5 scanf("%d",&n); 6 for(i=1; i<n; i++) { 7 s = (s+1)*2; 8 } 9 printf("%d",s); 10 }