本人刚学完高精度和乘方
2026-10-19 13:29:08
发布于：广东
2阅读
0回复
0点赞
当我刚学完for循环想算2的n次方belike:
#include <bits/stdc++.h>
using namespace std;
long long sum = 1;
int main(){
int n;
cin >> n;
for (int i = 1;i <= n;i++) {
sum *= 2;
}
cout << sum;
return 0;
}
想要二的78次方：
78
0
--------------------------------
Process exited after 1.858 seconds with return value 0
请按任意键继续. . .
现在学了高精度的我：
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 100010;
int main(){
int m;
cin >> m;
for (int j = 1;j <= m;j++) {
int a[MAXN];
a[0] = 1;
int len = 1;
for(int i = 1; i <= j; i++) {
int c = 0;
for(int j = 0; j < len; j++) {
int t = a[j] * 2 + c;
a[j] = t % 10;
c = t / 10;
}
if(c > 0){
a[len++] = c;
}
}
cout << "2^" << j << "=";
for(int i = len - 1; i >= 0; i--) cout << a[i];
cout << endl;
}
return 0;
}
这样2的多少次方我都知道了
78
2^1=2
2^2=4
2^3=8
2^4=16
2^5=32
2^6=64
2^7=128
2^8=256
2^9=512
2^10=1024
2^11=2048
2^12=4096
2^13=8192
2^14=16384
2^15=32768
2^16=65536
2^17=131072
2^18=262144
2^19=524288
2^20=1048576
2^21=2097152
2^22=4194304
2^23=8388608
2^24=16777216
2^25=33554432
2^26=67108864
2^27=134217728
2^28=268435456
2^29=536870912
2^30=1073741824
2^31=2147483648
2^32=4294967296
2^33=8589934592
2^34=17179869184
2^35=34359738368
2^36=68719476736
2^37=137438953472
2^38=274877906944
2^39=549755813888
2^40=1099511627776
2^41=2199023255552
2^42=4398046511104
2^43=8796093022208
2^44=17592186044416
2^45=35184372088832
2^46=70368744177664
2^47=140737488355328
2^48=281474976710656
2^49=562949953421312
2^50=1125899906842624
2^51=2251799813685248
2^52=4503599627370496
2^53=9007199254740992
2^54=18014398509481984
2^55=36028797018963968
2^56=72057594037927936
2^57=144115188075855872
2^58=288230376151711744
2^59=576460752303423488
2^60=1152921504606846976
2^61=2305843009213693952
2^62=4611686018427387904
2^63=9223372036854775808
2^64=18446744073709551616
2^65=36893488147419103232
2^66=73786976294838206464
2^67=147573952589676412928
2^68=295147905179352825856
2^69=590295810358705651712
2^70=1180591620717411303424
2^71=2361183241434822606848
2^72=4722366482869645213696
2^73=9444732965739290427392
2^74=18889465931478580854784
2^75=37778931862957161709568
2^76=75557863725914323419136
2^77=151115727451828646838272
2^78=302231454903657293676544
--------------------------------
Process exited after 2.119 seconds with return value 0
请按任意键继续. . .
大佬勿喷！
这里空空如也
有帮助，赞一个