运行效果：

纯手工编写，有BUG可以联系我。

好像10位以上的数和负数不能正常显示。。。但结果是对的。只要你能猜出来乱码是什么的话。比如“：”代表“10”。

//该进好的
#include <iostream>
#include <cmath>
using namespace std; double ans2(char* c)
{
double a,b;
double sum;
char t;
a=c[2]-48;b=c[4]-48;
t=c[3];
// cout<<"a: "<<a<<"b: "<<b<<"t: "<<t<<endl;
if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;}
//cout<<sum<<endl;
a=sum;b=c[7]-48;
t=c[6];
// cout<<"a: "<<a<<"b: "<<b<<"t: "<<t<<endl;
if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;}
a=sum;b=c[10]-48;
t=c[9];
// cout<<"a: "<<a<<"b: "<<b<<"t: "<<t<<endl;
if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;}
return sum;
}
double ans3(char* c)
{
char t;
double a,b;
double sum1=0,sum2=0,sum=0; a=c[1]-48; b=c[3]-48; t=c[2]; if(t=='+')
{sum1=a+b;}
if(t=='-')
{sum1=a-b;}
if(t=='*')
{sum1=a*b;}
if(t=='/')
{sum1=a/b;} a=c[7]-48; b=c[9]-48; t=c[8]; if(t=='+')
{sum2=a+b;}
if(t=='-')
{sum2=a-b;}
if(t=='*')
{sum2=a*b;}
if(t=='/')
{sum2=a/b;} a=sum1; b=sum2; t=c[5]; if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;} return sum;
} void fkind(char* a,int n,int i,char* t,char *p)
{
static int tot=0;
if(i==n)
{
for(int j=0;j<n;j++)
{
// cout<<t[j]<<" ";
p[tot++]=t[j];
}
// cout<<endl;
// cout<<endl<<tot++<<endl;
}
else if(i<n)
{
for(int j=0;j<4;j++)
{
t[i]=a[j];
fkind(a,n,i+1,t,p);
}
}
}
void nkind(int* a,int n,int i,int* t,int *p)
{
static int tot=0;
if(i==n)
{
for(int j=0;j<n;j++)
{
// cout<<t[j]<<" ";
p[tot++]=t[j];
}
// cout<<endl;
// cout<<endl<<tot++<<endl;
}
else if(i<n)
{
for(int j=0;j<4;j++)
{
if(a[j]!=-1)
{
t[i]=a[j];
int s=a[j];
a[j]=-1;
nkind(a,n,i+1,t,p);
a[j]=s;
}
}

}
}
void equation(int* a,char* b,char* c)
{
c[0]=c[1]='(';
c[5]=c[8]=')';
c[2]=a[0]+48;
c[4]=a[1]+48;
c[7]=a[2]+48;
c[10]=a[3]+48;
c[3]=b[0];
c[6]=b[1];
c[9]=b[2];
c[11]='\0';
}
void equation3(int* a,char* b,char* c)
{
c[0]=c[6]='(';
c[4]=c[10]=')';
c[1]=a[0]+48;
c[3]=a[1]+48;
c[7]=a[2]+48;
c[9]=a[3]+48;
c[2]=b[0];
c[5]=b[1];
c[8]=b[2];
c[11]='\0';
} void actoa2(int* a,char (*p)[5],int *sig)
{
int i=0;
for(i=0;i<4;i++)
{
if(sig[i]==1)
{
if(*(p+i)[0]=='1') a[i]=1;
if(*(p+i)[0]=='2') a[i]=2;
if(*(p+i)[0]=='3') a[i]=3;
if(*(p+i)[0]=='4') a[i]=4;
if(*(p+i)[0]=='5') a[i]=5;
if(*(p+i)[0]=='6') a[i]=6;
if(*(p+i)[0]=='7') a[i]=7;
if(*(p+i)[0]=='8') a[i]=8;
if(*(p+i)[0]=='9') a[i]=9;
}
else if(sig[i]==2)
{
if(p[i][1]=='0'&&*(p+i)[0]=='1') {a[i]=10; }
if(p[i][1]=='1'&&*(p+i)[0]=='1') {a[i]=11; }
if(p[i][1]=='2'&&*(p+i)[0]=='1') {a[i]=12; }
if(p[i][1]=='3'&&*(p+i)[0]=='1') {a[i]=13; }
}
else if(sig[i]==0)
{
if(*(p+i)[0]=='a'||*(p+i)[0]=='A') a[i]=1;
if(*(p+i)[0]=='j'||*(p+i)[0]=='J') a[i]=11;
if(*(p+i)[0]=='q'||*(p+i)[0]=='Q') a[i]=12;
if(*(p+i)[0]=='k'||*(p+i)[0]=='K') a[i]=13;
}
}
} int main()
{
// char c[15]; int a[4];
int sig[4];
char ac[4][5];
int num[24][4];
int tn[4];
int* pn=num[0];
char str[64][3];
char cs[4]={'+','-','*','/'};
char tc[4];
char* ps=str[0];
fkind(cs,3,0,tc,ps);
cout<<"可以输入字母J,Q,K,A代替11,12,13,1:\n";
for(int i=0;i<4;i++)
{
cin>>ac[i];
if(ac[i][2]=='\0'&&(ac[i][1]=='1'||ac[i][1]=='2'||ac[i][1]=='3'||ac[i][1]=='0')&&ac[i][0]=='1') sig[i]=2;
else
{
if(ac[i][0]>='1'&&ac[i][0]<='9'&&ac[i][1]=='\0') sig[i]=1;
else sig[i]=0;
}
}
actoa2(a,ac,sig);
nkind(a,4,0,tn,pn);
int i,j;
int ok=0;
int tot=0;
for(i=0;i<24;i++)
{
for(j=0;j<64;j++)
{
tot++;
double x=0.0;
char c[15];
equation(num[i],str[j],c);
x=ans2(c);
if(fabs(x-24.0)<=1e-5)
{
ok=1;
for(int k=0;k<11;k++)
{
if(k==2||k==4||k==7||k==10)
{
if(c[k]==';') c[k]='J';
else if(c[k]==':') c[k]='T';
else if(c[k]=='<') c[k]='Q';
else if(c[k]=='=') c[k]='K';
else if(c[k]=='1') c[k]='A';
}
}
for(int k=0;k<11;k++)
cout<<c[k];
cout<<"=24"<<endl;
}
double y=0.0;
char d[15];
equation3(num[i],str[j],d);
y=ans3(d);
if(fabs(y-24.0)<=1e-5)
{
ok=1;
for(int k=0;k<11;k++)
{
if(k==1||k==3||k==7||k==9)
{
if(d[k]==';') d[k]='J';
else if(d[k]==':') d[k]='T';
else if(d[k]=='<') d[k]='Q';
else if(d[k]=='=') d[k]='K';
else if(d[k]=='1') d[k]='A';
}
}
for(int k=0;k<11;k++)
cout<<d[k];
cout<<"=24"<<endl;
} }
if(ok==1)
break;
if(tot==1536)
cout<<"NO ANSWER!\n";
}
char ch;
cout<<"按任意键结束.....";
cin>>ch;
return 0;
}

以下是最新版的，这回不会再出错了：
*
为了纪念我24号开学
*/
#include <iostream>
#include <cmath>
using namespace std;double ans2(char* c)
{
double a,b;
double sum;
char t;
a=c[2]-48;b=c[4]-48;
t=c[3];
// cout<<"a: "<<a<<"b: "<<b<<"t: "<<t<<endl;
if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;}
//cout<<sum<<endl;
a=sum;b=c[7]-48;
t=c[6];
// cout<<"a: "<<a<<"b: "<<b<<"t: "<<t<<endl;
if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;}
a=sum;b=c[10]-48;
t=c[9];
// cout<<"a: "<<a<<"b: "<<b<<"t: "<<t<<endl;
if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;}
return sum;
}
double ans3(char* c)
{
char t;
double a,b;
double sum1=0,sum2=0,sum=0; a=c[1]-48; b=c[3]-48; t=c[2]; if(t=='+')
{sum1=a+b;}
if(t=='-')
{sum1=a-b;}
if(t=='*')
{sum1=a*b;}
if(t=='/')
{sum1=a/b;} a=c[7]-48; b=c[9]-48; t=c[8]; if(t=='+')
{sum2=a+b;}
if(t=='-')
{sum2=a-b;}
if(t=='*')
{sum2=a*b;}
if(t=='/')
{sum2=a/b;} a=sum1; b=sum2; t=c[5]; if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;} return sum;
}
double ans4(char* c)
{
char t;
double a,b;
double sum1=0,sum2=0,sum=0; a=c[4]-48; b=c[6]-48; t=c[5]; if(t=='+')
{sum1=a+b;}
if(t=='-')
{sum1=a-b;}
if(t=='*')
{sum1=a*b;}
if(t=='/')
{sum1=a/b;} a=c[1]-48; b=sum1; t=c[2]; if(t=='+')
{sum2=a+b;}
if(t=='-')
{sum2=a-b;}
if(t=='*')
{sum2=a*b;}
if(t=='/')
{sum2=a/b;} a=sum2; b=c[10]-48; t=c[9]; if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;} return sum;
}double ans5(char* c)
{
char t;
double a,b;
double sum1=0,sum2=0,sum=0; a=c[4]-48; b=c[6]-48; t=c[5]; if(t=='+')
{sum1=a+b;}
if(t=='-')
{sum1=a-b;}
if(t=='*')
{sum1=a*b;}
if(t=='/')
{sum1=a/b;} a=sum1; b=c[9]-48; t=c[8]; if(t=='+')
{sum2=a+b;}
if(t=='-')
{sum2=a-b;}
if(t=='*')
{sum2=a*b;}

if(t=='/')
{sum2=a/b;} a=c[0]-48; b=sum2; t=c[1]; if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;} return sum;
}double ans6(char* c)
{
char t;
double a,b;
double sum1=0,sum2=0,sum=0; a=c[6]-48; b=c[8]-48; t=c[7]; if(t=='+')
{sum1=a+b;}
if(t=='-')
{sum1=a-b;}
if(t=='*')
{sum1=a*b;}
if(t=='/')
{sum1=a/b;} a=c[3]-48; b=sum1; t=c[4]; if(t=='+')
{sum2=a+b;}
if(t=='-')
{sum2=a-b;}
if(t=='*')
{sum2=a*b;}
if(t=='/')
{sum2=a/b;} a=c[0]-48; b=sum2; t=c[1]; if(t=='+')
{sum=a+b;}
if(t=='-')
{sum=a-b;}
if(t=='*')
{sum=a*b;}
if(t=='/')
{sum=a/b;} return sum;
}void fkind(char* a,int n,int i,char* t,char *p)
{
static int tot=0;
if(i==n)
{
for(int j=0;j<n;j++)
{
// cout<<t[j]<<" ";
p[tot++]=t[j];
}
// cout<<endl;
// cout<<endl<<tot++<<endl;
}
else if(i<n)
{
for(int j=0;j<4;j++)
{
t[i]=a[j];
fkind(a,n,i+1,t,p);
}
}
}
void nkind(int* a,int n,int i,int* t,int *p)
{
static int tot=0;
if(i==n)
{
for(int j=0;j<n;j++)
{
// cout<<t[j]<<" ";
p[tot++]=t[j];
}
// cout<<endl;
// cout<<endl<<tot++<<endl;
}
else if(i<n)
{
for(int j=0;j<4;j++)
{
if(a[j]!=-1)
{
t[i]=a[j];
int s=a[j];
a[j]=-1;
nkind(a,n,i+1,t,p);
a[j]=s;
}
}
}
}
void equation(int* a,char* b,char* c)
{
c[0]=c[1]='(';
c[5]=c[8]=')';
c[2]=a[0]+48;
c[4]=a[1]+48;
c[7]=a[2]+48;
c[10]=a[3]+48;
c[3]=b[0];
c[6]=b[1];
c[9]=b[2];
c[11]='\0';
}
void equation3(int* a,char* b,char* c)
{
c[0]=c[6]='(';
c[4]=c[10]=')';
c[1]=a[0]+48;
c[3]=a[1]+48;
c[7]=a[2]+48;
c[9]=a[3]+48;
c[2]=b[0];
c[5]=b[1];
c[8]=b[2];
c[11]='\0';
}
void equation4(int* a,char* b,char* c)
{
c[0]=c[3]='(';
c[8]=c[7]=')';
c[1]=a[0]+48;
c[4]=a[1]+48;
c[6]=a[2]+48;
c[10]=a[3]+48;
c[2]=b[0];
c[5]=b[1];
c[9]=b[2];
c[11]='\0';
}
void equation5(int* a,char* b,char* c)
{
c[2]=c[3]='(';
c[10]=c[7]=')';
c[0]=a[0]+48;
c[4]=a[1]+48;
c[6]=a[2]+48;
c[9]=a[3]+48;
c[1]=b[0];
c[5]=b[1];
c[8]=b[2];
c[11]='\0';
}void equation6(int* a,char* b,char* c)
{
c[2]=c[5]='(';
c[10]=c[9]=')';
c[0]=a[0]+48;
c[3]=a[1]+48;
c[6]=a[2]+48;
c[8]=a[3]+48;
c[1]=b[0];
c[4]=b[1];
c[7]=b[2];
c[11]='\0';
}void actoa2(int* a,char (*p)[5],int *sig)
{
int i=0;
for(i=0;i<4;i++)
{
if(sig[i]==1)
{
if(*(p+i)[0]=='1') a[i]=1;
if(*(p+i)[0]=='2') a[i]=2;
if(*(p+i)[0]=='3') a[i]=3;
if(*(p+i)[0]=='4') a[i]=4;
if(*(p+i)[0]=='5') a[i]=5;
if(*(p+i)[0]=='6') a[i]=6;
if(*(p+i)[0]=='7') a[i]=7;
if(*(p+i)[0]=='8') a[i]=8;
if(*(p+i)[0]=='9') a[i]=9;
}
else if(sig[i]==2)
{
if(p[i][1]=='0'&&*(p+i)[0]=='1') {a[i]=10; }
if(p[i][1]=='1'&&*(p+i)[0]=='1') {a[i]=11; }
if(p[i][1]=='2'&&*(p+i)[0]=='1') {a[i]=12; }
if(p[i][1]=='3'&&*(p+i)[0]=='1') {a[i]=13; }
}
else if(sig[i]==0)
{
if(*(p+i)[0]=='a'||*(p+i)[0]=='A') a[i]=1;
if(*(p+i)[0]=='j'||*(p+i)[0]=='J') a[i]=11;
if(*(p+i)[0]=='q'||*(p+i)[0]=='Q') a[i]=12;
if(*(p+i)[0]=='k'||*(p+i)[0]=='K') a[i]=13;
}
}
}

//接上
int main()
{
// char c[15]; int a[4];
int sig[4];
char ac[4][5];
int num[24][4];
int tn[4];
int* pn=num[0];
char str[64][3];
char cs[4]={'+','-','*','/'};
char tc[4];
char* ps=str[0];
fkind(cs,3,0,tc,ps);
cout<<"可以输入字母J,Q,K,A代替11,12,13,1:\n";
for(int i=0;i<4;i++)
{
cin>>ac[i];
if(ac[i][2]=='\0'&&(ac[i][1]=='1'||ac[i][1]=='2'||ac[i][1]=='3'||ac[i][1]=='0')&&ac[i][0]=='1') sig[i]=2;
else
{
if(ac[i][0]>='1'&&ac[i][0]<='9'&&ac[i][1]=='\0') sig[i]=1;
else sig[i]=0;
}
}
actoa2(a,ac,sig);
nkind(a,4,0,tn,pn);
int i,j;
int ok=0;
int tot=0;
for(i=0;i<24;i++)
{
for(j=0;j<64;j++)
{
tot++;
double x=0.0;
char c[15];
equation(num[i],str[j],c);
x=ans2(c);
if(fabs(x-24.0)<=1e-5)
{
ok=1;
for(int k=0;k<11;k++)
{
if(k==2||k==4||k==7||k==10)
{
if(c[k]==';') c[k]='J';
else if(c[k]==':') c[k]='T';
else if(c[k]=='<') c[k]='Q';
else if(c[k]=='=') c[k]='K';
else if(c[k]=='1') c[k]='A';
}
}
for(int k=0;k<11;k++)
cout<<c[k];
cout<<"=24"<<endl;
}
if(fabs(x-4.0)<=1e-5)
{
cout<<"可用阶乘:\n";
ok=2;
for(int k=0;k<11;k++)
{
if(k==2||k==4||k==7||k==10)
{
if(c[k]==';') c[k]='J';
else if(c[k]==':') c[k]='T';
else if(c[k]=='<') c[k]='Q';
else if(c[k]=='=') c[k]='K';
else if(c[k]=='1') c[k]='A';
}
}
cout<<"(";
for(int k=0;k<11;k++)
cout<<c[k];
cout<<")!=24"<<endl;
} double y=0.0;
char d[15];
equation3(num[i],str[j],d);
y=ans3(d);
if(fabs(y-24.0)<=1e-5)
{
ok=1;
for(int k=0;k<11;k++)
{
if(k==1||k==3||k==7||k==9)
{
if(d[k]==';') d[k]='J';

else if(d[k]==':') d[k]='T';
else if(d[k]=='<') d[k]='Q';
else if(d[k]=='=') d[k]='K';
else if(d[k]=='1') d[k]='A';
}
}
for(int k=0;k<11;k++)
cout<<d[k];
cout<<"=24"<<endl;
}
if(fabs(y-4.0)<=1e-5)
{
cout<<"可用阶乘:\n";
ok=2;
for(int k=0;k<11;k++)
{
for(int k=0;k<11;k++)
{
if(k==1||k==3||k==7||k==9)
{
if(d[k]==';') d[k]='J';
else if(d[k]==':') d[k]='T';
else if(d[k]=='<') d[k]='Q';
else if(d[k]=='=') d[k]='K';
else if(d[k]=='1') d[k]='A';
}
}
}
cout<<"(";
for(int k=0;k<11;k++)
cout<<d[k];
cout<<")!=24"<<endl;
} double e1=0.0;
char e[15];
equation4(num[i],str[j],e);
e1=ans4(e);
if(fabs(e1-24.0)<=1e-5)
{
ok=1;
for(int k=0;k<11;k++)
{
if(k==1||k==4||k==6||k==10)
{
if(e[k]==';') e[k]='J';
else if(e[k]==':') e[k]='T';
else if(e[k]=='<') e[k]='Q';
else if(e[k]=='=') e[k]='K';
else if(e[k]=='1') e[k]='A';
}
}
for(int k=0;k<11;k++)
cout<<e[k];
cout<<"=24"<<endl;
}
if(fabs(e1-4.0)<=1e-5)
{
cout<<"可用阶乘:\n";
ok=2;
for(int k=0;k<11;k++)
{
for(int k=0;k<11;k++)
{
if(k==1||k==4||k==6||k==10)
{
if(e[k]==';') e[k]='J';
else if(e[k]==':') e[k]='T';
else if(e[k]=='<') e[k]='Q';
else if(e[k]=='=') e[k]='K';
else if(e[k]=='1') e[k]='A';
}
}
}
cout<<"(";
for(int k=0;k<11;k++)
cout<<e[k];
cout<<")!=24"<<endl;
}

double f1=0.0;
char f[15];
equation5(num[i],str[j],f);
f1=ans5(f);
if(fabs(f1-24.0)<=1e-5)
{
ok=1;
for(int k=0;k<11;k++)
{
if(k==0||k==4||k==6||k==9)
{
if(f[k]==';') f[k]='J';
else if(f[k]==':') f[k]='T';
else if(f[k]=='<') f[k]='Q';
else if(f[k]=='=') f[k]='K';
else if(f[k]=='1') f[k]='A';
}
}
for(int k=0;k<11;k++)
cout<<f[k];
cout<<"=24"<<endl;
}
if(fabs(f1-4.0)<=1e-5)
{
cout<<"可用阶乘:\n";
ok=2;
for(int k=0;k<11;k++)
{
for(int k=0;k<11;k++)
{
if(k==0||k==4||k==6||k==9)
{
if(f[k]==';') f[k]='J';
else if(f[k]==':') f[k]='T';
else if(f[k]=='<') f[k]='Q';
else if(f[k]=='=') f[k]='K';
else if(f[k]=='1') f[k]='A';
}
}
}
cout<<"(";
for(int k=0;k<11;k++)
cout<<f[k];
cout<<")!=24"<<endl;
}
double g1=0.0;
char g[15];
equation6(num[i],str[j],g);
g1=ans6(g);
if(fabs(g1-24.0)<=1e-5)
{
ok=1;
for(int k=0;k<11;k++)
{
if(k==0||k==3||k==6||k==8)
{
if(g[k]==';') g[k]='J';
else if(g[k]==':') g[k]='T';
else if(g[k]=='<') g[k]='Q';
else if(g[k]=='=') g[k]='K';
else if(g[k]=='1') g[k]='A';
}
}
for(int k=0;k<11;k++)
cout<<g[k];
cout<<"=24"<<endl;
}
if(fabs(g1-4.0)<=1e-5)
{
cout<<"可用阶乘:\n";
ok=2;
for(int k=0;k<11;k++)
{
for(int k=0;k<11;k++)
{
if(k==0||k==3||k==6||k==8)
{
if(g[k]==';') g[k]='J';
else if(g[k]==':') g[k]='T';
else if(g[k]=='<') g[k]='Q';
else if(g[k]=='=') g[k]='K';
else if(g[k]=='1') g[k]='A';
}
}
}
cout<<"(";
for(int k=0;k<11;k++)
cout<<g[k];
cout<<")!=24"<<endl;
} }
if(ok==1)
break;
if(tot==1536&&ok==0)
cout<<"NO ANSWER!\n";
}
char ch;
cout<<"按任意键结束.....";
cin>>ch;
return 0;
}

楼主可帮我生成个工程文件吗？