1.16 24点游戏

#include<stdio.h>
char mark[4]={'+','-','*','/'};
float cal(float x,float y,int mark)
{
switch(mark)
{
case 0:return x+y;
case 1:return x-y;
case 2:return x*y;
case 3:return x/y;
}
}
float calculate_A(float a,float b,float c,float d,int mark1,int mark2,int mark3)
{
float r1,r2,r3;
r1=cal(a,b,mark1);
r2=cal(r1,c,mark2);
r3=cal(r2,d,mark3);
return r3;
}
float calculate_B(float a,float b,float c,float d,int mark1,int mark2,int mark3)
{
float r1,r2,r3;
r1=cal(b,c,mark2);
r2=cal(a,r1,mark1);
r3=cal(r2,d,mark3);
return r3;
}
float calculate_C(float a,float b,float c,float d,int mark1,int mark2,int mark3)
{
float r1,r2,r3;
r1=cal(c,d,mark3);
r2=cal(b,r1,mark2);
r3=cal(a,r2,mark1);
return r3;
}
float calculate_D(float a,float b,float c,float d,int mark1,int mark2,int mark3)
{
float r1,r2,r3;
r1=cal(b,c,mark2);
r2=cal(r1,d,mark3);
r3=cal(a,r2,mark1);
return r3;
}
float calculate_E(float a,float b,float c,float d,int mark1,int mark2,int mark3)
{
float r1,r2,r3;
r1=cal(a,b,mark1);
r2=cal(c,d,mark3);
r3=cal(r1,r2,mark2);
return r3;
}
float get(int a,int b,int c,int d)
{
int mark1,mark2,mark3;
float flag=0;
for(mark1=0;mark1<4;mark1++)
{
for(mark2=0;mark2<4;mark2++)
{
for(mark3=0;mark3<4;mark3++)
{
if(calculate_A(a,b,c,d,mark1,mark2,mark3)==24)
{
printf("((%d%c%d)%c%d)%c%d=24\n",a,mark[mark1],b,mark[mark2],c,mark[mark3],d);
flag=1;
}
if(calculate_B(a,b,c,d,mark1,mark2,mark3)==24)
{
printf("(%d%c(%d%c%d))%c%d=24\n",a,mark[mark1],b,mark[mark2],c,mark[mark3],d);
flag=1;
}
if(calculate_C(a,b,c,d,mark1,mark2,mark3)==24)
{
printf("%d%c(%d%c(%d%c%d))=24\n",a,mark[mark1],b,mark[mark2],c,mark[mark3],d);
flag=1;
}
if(calculate_D(a,b,c,d,mark1,mark2,mark3)==24)
{
printf("%d%c((%d%c%d)%c%d)=24\n",a,mark[mark1],b,mark[mark2],c,mark[mark3],d);
flag=1;
}
if(calculate_E(a,b,c,d,mark1,mark2,mark3)==24)
{
printf("(%d%c%d)%c(%d%c%d)=24\n",a,mark[mark1],b,mark[mark2],c,mark[mark3],d);
flag=1;
}
}
}
}
return flag;
}
main()
{
int a,b,c,d;
printf("Please input 4 numbers(1~13):");
scanf("%d%d%d%d",&a,&b,&c,&d);
if((a>=1&&a<=13)&&(b>=1&&b<=13)&&(c>=1&&c<=13)&&(d>=1&&d<=13))
{
get(a,b,c,d);
}
else
{
printf("Input illege,please input again(1~13)");
}
system("pause");
}