24点游戏（简单版）
#include
using namespace std;
int x,y,z,w,ans;
char a[5] = {'0','+','-','*','/'};
bool flag = false;
int ja(int x,int y){return x + y;}
int jn(int x,int y){return x - y;}
int cg(int x,int y){return x * y;}
int cu(int x,int y){return x / y;}
void f(int f,char a,int g,char b,int h,char c,int j){
if(a == '+' && b == '+' && c == '+' && f+g+h+j == 24){flag = true;return;}
if(a == '+' && b == '+' && c == '-' && f+g+h-j == 24){flag = true;return;}
if(a == '+' && b == '+' && c == '*' && f+g+h*j == 24){flag = true;return;}
if(a == '+' && b == '+' && c == '/' && f+g+h/j == 24){flag = true;return;}
if(a == '+' && b == '-' && c == '+' && f+g-h+j == 24){flag = true;return;}
if(a == '+' && b == '-' && c == '-' && f+g-h-j == 24){flag = true;return;}
if(a == '+' && b == '-' && c == '*' && f+g-h*j == 24){flag = true;return;}
if(a == '+' && b == '-' && c == '/' && f+g-h/j == 24){flag = true;return;}
if(a == '+' && b == '*' && c == '+' && f+g*h+j == 24){flag = true;return;}
if(a == '+' && b == '*' && c == '-' && f+g*h-j == 24){flag = true;return;}
if(a == '+' && b == '*' && c == '*' && f+g*h*j == 24){flag = true;return;}
if(a == '+' && b == '*' && c == '/' && f+g*h/j == 24){flag = true;return;}
if(a == '+' && b == '/' && c == '+' && f+g/h+j == 24){flag = true;return;}
if(a == '+' && b == '/' && c == '-' && f+g/h-j == 24){flag = true;return;}
if(a == '+' && b == '/' && c == '*' && f+g/h*j == 24){flag = true;return;}
if(a == '+' && b == '/' && c == '/' && f+g/h/j == 24){flag = true;return;}
if(a == '-' && b == '+' && c == '+' && f-g+h+j == 24){flag = true;return;}
if(a == '-' && b == '+' && c == '-' && f-g+h-j == 24){flag = true;return;}
if(a == '-' && b == '+' && c == '*' && f-g+h*j == 24){flag = true;return;}
if(a == '-' && b == '+' && c == '/' && f-g+h/j == 24){flag = true;return;}
if(a == '-' && b == '-' && c == '+' && f-g-h+j == 24){flag = true;return;}
if(a == '-' && b == '-' && c == '-' && f-g-h-j == 24){flag = true;return;}
if(a == '-' && b == '-' && c == '*' && f-g-h*j == 24){flag = true;return;}
if(a == '-' && b == '-' && c == '/' && f-g-h/j == 24){flag = true;return;}
if(a == '-' && b == '*' && c == '+' && f-g*h+j == 24){flag = true;return;}
if(a == '-' && b == '*' && c == '-' && f-g*h-j == 24){flag = true;return;}
if(a == '-' && b == '*' && c == '*' && f-g*h*j == 24){flag = true;return;}
if(a == '-' && b == '*' && c == '/' && f-g*h/j == 24){flag = true;return;}
if(a == '-' && b == '/' && c == '+' && f-g/h+j == 24){flag = true;return;}
if(a == '-' && b == '/' && c == '-' && f-g/h-j == 24){flag = true;return;}
if(a == '-' && b == '/' && c == '*' && f-g/h*j == 24){flag = true;return;}
if(a == '-' && b == '/' && c == '/' && f-g/h/j == 24){flag = true;return;}
if(a == '*' && b == '+' && c == '+' && f*g+h+j == 24){flag = true;return;}
if(a == '*' && b == '+' && c == '-' && f*g+h-j == 24){flag = true;return;}
if(a == '*' && b == '+' && c == '*' && f*g+h*j == 24){flag = true;return;}
if(a == '*' && b == '+' && c == '/' && f*g+h/j == 24){flag = true;return;}
if(a == '*' && b == '-' && c == '+' && f*g-h+j == 24){flag = true;return;}
if(a == '*' && b == '-' && c == '-' && f*g-h-j == 24){flag = true;return;}
if(a == '*' && b == '-' && c == '*' && f*g-h*j == 24){flag = true;return;}
if(a == '*' && b == '-' && c == '/' && f*g-h/j == 24){flag = true;return;}
if(a == '*' && b == '*' && c == '+' && f*g*h+j == 24){flag = true;return;}
if(a == '*' && b == '*' && c == '-' && f*g*h-j == 24){flag = true;return;}
if(a == '*' && b == '*' && c == '*' && f*g*h*j == 24){flag = true;return;}
if(a == '*' && b == '*' && c == '/' && f*g*h/j == 24){flag = true;return;}
if(a == '*' && b == '/' && c == '+' && f*g/h+j == 24){flag = true;return;}
if(a == '*' && b == '/' && c == '-' && f*g/h-j == 24){flag = true;return;}
if(a == '*' && b == '/' && c == '*' && f*g/h*j == 24){flag = true;return;}
if(a == '*' && b == '/' && c == '/' && f*g/h/j == 24){flag = true;return;}
if(a == '/' && b == '+' && c == '+' && f/g+h+j == 24){flag = true;return;}
if(a == '/' && b == '+' && c == '-' && f/g+h-j == 24){flag = true;return;}
if(a == '/' && b == '+' && c == '*' && f/g+h*j == 24){flag = true;return;}
if(a == '/' && b == '+' && c == '/' && f/g+h/j == 24){flag = true;return;}
if(a == '/' && b == '-' && c == '+' && f/g-h+j == 24){flag = true;return;}
if(a == '/' && b == '-' && c == '-' && f/g-h-j == 24){flag = true;return;}
if(a == '/' && b == '-' && c == '*' && f/g-h*j == 24){flag = true;return;}
if(a == '/' && b == '-' && c == '/' && f/g-h/j == 24){flag = true;return;}
if(a == '/' && b == '*' && c == '+' && f/g*h+j == 24){flag = true;return;}
if(a == '/' && b == '*' && c == '-' && f/g*h-j == 24){flag = true;return;}
if(a == '/' && b == '*' && c == '*' && f/g*h*j == 24){flag = true;return;}
if(a == '/' && b == '*' && c == '/' && f/g*h/j == 24){flag = true;return;}
if(a == '/' && b == '/' && c == '+' && f/g/h+j == 24){flag = true;return;}
if(a == '/' && b == '/' && c == '*' && f/g/h*j == 24){flag = true;return;}
if(a == '/' && b == '/' && c == '/' && f/g/h/j == 24){flag = true;return;}
return;
}
int main(){
//freopen("game15.in","r",stdin);
//freopen("game15.out","w",stdout);
scanf("%d %d %d %d",&x,&y,&z,&w);
for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(x,a[i],y,a[j],z,a[k],w);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(x,a[i],y,a[j],w,a[k],z);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(x,a[i],z,a[j],y,a[k],w);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(x,a[i],z,a[j],w,a[k],y);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(x,a[i],w,a[j],z,a[k],y);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(x,a[i],w,a[j],y,a[k],z);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(y,a[i],x,a[j],z,a[k],w);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(y,a[i],x,a[j],w,a[k],z);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(y,a[i],z,a[j],x,a[k],w);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(y,a[i],z,a[j],w,a[k],x);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(y,a[i],w,a[j],z,a[k],x);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(y,a[i],w,a[j],x,a[k],z);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(z,a[i],y,a[j],x,a[k],w);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(z,a[i],y,a[j],w,a[k],x);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(z,a[i],x,a[j],y,a[k],w);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(z,a[i],x,a[j],w,a[k],y);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(z,a[i],w,a[j],x,a[k],y);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(z,a[i],w,a[j],y,a[k],x);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(w,a[i],y,a[j],z,a[k],x);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(w,a[i],y,a[j],x,a[k],z);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(w,a[i],z,a[j],y,a[k],x);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(w,a[i],z,a[j],x,a[k],y);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(w,a[i],x,a[j],z,a[k],y);
}
}
}for(int i=1;i<=4;i++){
for(int j=1;j<=4;j++){
for(int k=1;k<=4;k++){
f(w,a[i],x,a[j],y,a[k],z);
}
}
}
if(!flag)printf("No");
else printf("Yes");
return 0;
}
##有人指导优化一下吗？
#c++/c/Python都可以，可能比较简单
终极版：
//定义下面5种运算顺序：
// ((A @ B) @ C) @ D =
// (A @ B) @ (C @ D) =
// (A @ (B @ C)) @ D =
// A @ ((B @ C) @ D) =
// A @ (B @ (C @ D))=
//23.99<计算结果<24.01
//其中：
//1≤A、B、C、D≤13
//@为“+、-、*、/”之一
//用浮点数计算，循环遍历以上所有情况即可。
#include <stdio.h>
#define when break;case
int A,B,C,D,N;
float r,r1,r2;
char op1,op2,op3;
char opc[4]={'+','-','*','/'};
void main() {
N=0;
for (A =1;A <=13;A ++) {
for (B =1;B <=13;B ++) {
for (C =1;C <=13;C ++) {
for (D =1;D <=13;D ++) {
for (op1=0;op1< 4;op1++) {
for (op2=0;op2< 4;op2++) {
for (op3=0;op3< 4;op3++) {
// ((A @ B) @ C) @ D
r=(float)A;
switch (op1) {case 0:r =r +B ;when 1:r =r -B ;when 2:r =r *B ;when 3: r =r /B ;break;}
switch (op2) {case 0:r =r +C ;when 1:r =r -C ;when 2:r =r *C ;when 3: r =r /C ;break;}
switch (op3) {case 0:r =r +D ;when 1:r =r -D ;when 2:r =r *D ;when 3: r =r /D ;break;}
if (23.99f<r && r<24.01f) {N++;printf("%5d: ((%2d %c %2d) %c %2d) %c %2d =24\n",N,A,opc[op1],B,opc[op2],C,opc[op3],D);}
// (A @ B) @ (C @ D)
r1=(float)A;
switch (op1) {case 0:r1=r1+B ;when 1:r1=r1-B ;when 2:r1=r1*B ;when 3: r1=r1/B ;break;}
r2=(float)C;
switch (op3) {case 0:r2=r2+D ;when 1:r2=r2-D ;when 2:r2=r2*D ;when 3: r2=r2/D ;break;}
switch (op2) {case 0:r =r1+r2;when 1:r =r1-r2;when 2:r =r1*r2;when 3:if (-0.01f<r2 && r2<0.01f) goto STEP3;r =r1/r2;break;}
if (23.99f<r && r<24.01f) {N++;printf("%5d: (%2d %c %2d) %c (%2d %c %2d) =24\n",N,A,opc[op1],B,opc[op2],C,opc[op3],D);}
// (A @ (B @ C)) @ D
STEP3:
r=(float)B;
switch (op2) {case 0:r =r +C ;when 1:r =r -C ;when 2:r =r *C ;when 3: r =r /C ;break;}
switch (op1) {case 0:r =A +r ;when 1:r =A -r ;when 2:r =A *r ;when 3:if (-0.01f<r && r <0.01f) goto STEP4;r =A /r ;break;}
switch (op3) {case 0:r =r +D ;when 1:r =r -D ;when 2:r =r *D ;when 3: r =r /D ;break;}
if (23.99f<r && r<24.01f) {N++;printf("%5d: (%2d %c (%2d %c %2d)) %c %2d =24\n",N,A,opc[op1],B,opc[op2],C,opc[op3],D);}
// A @ ((B @ C) @ D)
STEP4:
r=(float)B;
switch (op2) {case 0:r =r +C ;when 1:r =r -C ;when 2:r =r *C ;when 3: r =r /C ;break;}
switch (op3) {case 0:r =r +D ;when 1:r =r -D ;when 2:r =r *D ;when 3: r =r /D ;break;}
switch (op1) {case 0:r =A +r ;when 1:r =A -r ;when 2:r =A *r ;when 3:if (-0.01f<r && r <0.01f) goto STEP5;r =A /r ;break;}
if (23.99f<r && r<24.01f) {N++;printf("%5d: %2d %c ((%2d %c %2d) %c %2d) =24\n",N,A,opc[op1],B,opc[op2],C,opc[op3],D);}
// A @ (B @ (C @ D))
STEP5:
r=(float)C;
switch (op3) {case 0:r =r +D ;when 1:r =r -D ;when 2:r =r *D ;when 3: r =r /D ;break;}
switch (op2) {case 0:r =B +r ;when 1:r =B -r ;when 2:r =B *r ;when 3:if (-0.01f<r && r <0.01f) continue ;r =B /r ;break;}
switch (op1) {case 0:r =A +r ;when 1:r =A -r ;when 2:r =A *r ;when 3:if (-0.01f<r && r <0.01f) continue ;r =A /r ;break;}
if (23.99f<r && r<24.01f) {N++;printf("%5d: %2d %c (%2d %c (%2d %c %2d))=24\n",N,A,opc[op1],B,opc[op2],C,opc[op3],D);}
}//op3
}//op2
}//op1
}//D
}//C
}//B
}//A
}
//运行结果：
// 1: (( 1 + 1) + 1) * 8 =24
// 2: ( 1 + ( 1 + 1)) * 8 =24
// 3: ( 1 + 1) * ( 1 + 11) =24
// ... ...
//53280: (13 + 13) / (13 / 12) =24
//53281: (13 - (13 / 13)) + 12 =24
//53282: 13 - ((13 / 13) - 12) =24
- 给你找了一篇非常好的博客，你可以看看是否有帮助，链接：24点游戏（1）