在 vs code 界面先输入
Ctrl + Shift + P
接着输入
configure user snippets
然后找到 c++ ，然后复制下面的代码，以后输入 prefix 里的东西再回车即可
{
// Place your snippets for cpp here. Each snippet is defined under a snippet name and has a prefix, body and
// description. The prefix is what is used to trigger the snippet and the body will be expanded and inserted. Possible variables are:
// $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders. Placeholders with the
// same ids are connected.
// Example:
// "Print to console": {
// "prefix": "log",
// "body": [
// "console.log('$1');",
// "$2"
// ],
// "description": "Log output to console"
// }
"DEBUG-DEFINE":{
"prefix": "debug-define",
"body": [
"#define DEBUG",
"#define d1(x) std::cout << #x \" = \" << (x) << std::endl",
"#define d2(x, y) std::cout << #x \" = \" << (x) << \" ,\" #y \" = \" << (y) << std::endl",
"#define disp(arry, fr, to) \\",
" { \\",
" std::cout << #arry \" : \"; \\",
" for(int _i = fr; _i <= to; _i++) std::cout << arry[_i] << \" \"; \\",
" std::cout << std::endl; \\",
" }",
"$0"
],
"description": "debug-define"
},
"for":{
"prefix": "forint i",
"body": [
"for(int ${1:Temporary}=${2:0};$1<${3:n};++$1)$0"
]
},
"scanf1":{
"prefix": "s1anf",
"body": [
"scanf(\"%${1:d}\",&${2:Variable})$0"
],
"description": "scanf1"
},
"scanf2":{
"prefix": "s2anf",
"body": [
"scanf(\"%${1:d} %${3:d}\",&${2:Variable1},&${4:Variable2})$0"
],
"description": "scanf2"
},
"scanf3":{
"prefix": "s3anf",
"body": [
"scanf(\"%${1:d} %${3:d} %${5:d}\",&${2:Variable1},&${4:Variable2},&${6:Variable3})$0"
],
"description": "scanf3"
},
"base": {
"prefix": "base",
"body": [
"#include ",
"",
"#define ed end()",
"#define bg begin()",
"#define mp make_pair",
"#define pb push_back",
"#define vv(T) v(v(T))",
"#define v(T) vector",
"#define all(x) x.bg,x.ed",
"#define newline puts(\"\")",
"#define si(x) ((int)x.size())",
"#define rep(i,n) for(int i=1;i<=n;++i)",
"#define rrep(i,n) for(int i=0;i=s;--i)",
"",
"using namespace std;",
"typedef long long ll;",
"typedef pair pii;",
"const int Maxn = 1e5+10;",
"const int Inf = 0x7f7f7f7f;",
"const ll Inf_ll = 1ll*Inf*Inf;",
"const int Mod = 1e9+7;",
"const double eps = 1e-7;",
"",
"int main(){",
" $0",
" return 0;",
"}",
],
"description": "basic components"
},
"fread": {
"prefix": "readint",
"body": [
"inline int r(){",
" char c = getchar();int x = 0,fh = 0;",
" while(c < '0' || c > '9'){fh |= c == '-';c = getchar();}",
" while(c >= '0' && c <= '9'){x = (x << 1) + (x << 3) + (c ^ 48);c = getchar();}",
" return fh?-x:x;",
"}"
],
"description": "fast read"
},
"quick_pow":{
"prefix": "qpow",
"body": [
"ll mypow(ll a,ll b){",
" ll inv = 1;",
" while( b ){",
" if( b&1 ) inv = inv*a%Mod;",
" a = a*a%Mod;",
" b >>= 1;",
" }",
" return inv;",
"}"
]
},
"GCD":{
"prefix": "GCD",
"body": [
"ll gcd(ll a,ll b){",
" return b == 0 ? a : gcd(b,a%b);",
"}"
]
},
"Linear_sieve":{
"prefix": "Linear_sieve",
"body": [
"int prim[Maxn],tol,mu[Maxn],phi[Maxn];",
"bool vis[Maxn];",
"void Get(int n){",
" mu[1] = phi[1] = 1;",
" for(int i=2;i<=n;i++)",
" {",
" if( !vis[i] ) prim[++tol] = i,mu[i] = -1,phi[i] = i-1;",
" for(int j=1;j<=tol&&i*prim[j]<=n;j++)",
" {",
" vis[i*prim[j]] = true;",
" if( i%prim[j] == 0 )",
" {",
" phi[i*prim[j]] = phi[i]*prim[j];",
" break;",
" }",
" mu[i*prim[j]] = -mu[i];",
" phi[i*prim[j]] = phi[i]*(prim[j]-1);",
" }",
" }",
"}"
]
},
"TTT":{
"prefix": "TTT",
"body": [
"int T;",
"scanf(\"%d\",&T);",
"for(int _=1;_<=T;_++)",
"{",
" $1",
"}",
]
},
"FAC":{
"prefix": "FAC",
"body": [
"ll inv[Maxn],fac[Maxn],finv[Maxn];",
"void Init(int n){",
" inv[0] = inv[1] = fac[0] = finv[0] = 1;",
" for(int i=2;i<=n;i++)",
" inv[i] = 1ll*(Mod - Mod/i)*inv[Mod%i]%Mod;",
" for(int i=1;i<=n;i++)",
" fac[i] = fac[i-1]*i%Mod,",
" finv[i] = finv[i-1]*inv[i]%Mod;",
"}"
]
},
"ST_def":{
"prefix": "ST_def",
"body":[
"#define L t<<1",
"#define R L|1",
"#define l(a) ST[a].l",
"#define r(a) ST[a].r",
"#define s(a) ST[a].sum"
]
},
"fout":{
"prefix": "outint",
"body": [
"void print(int x){",
" if( x < 0 ) x = -x;",
" if( x >= 10 ) print(x/10);",
" putchar(x%10+'0');",
"}"
]
},
"freopen":{
"prefix": "readfile",
"body":[
"freopen(\"1.in\",\"r\",stdin);",
"freopen(\"1.out\",\"w\",stdout);"
]
}
}