标题: 计算排列和组合源代码[修改bug&简化] [打印本页] 作者: 51黑tt 时间: 2016-3-5 15:45 标题: 计算排列和组合源代码[修改bug&简化] #include <stdio.h>-
void print_date (int a,int b) {-
printf("n = %d , m = %d",a,b);-
}-
-
int pailie (int a,int b) {-
int tmp = 1;-
for (b--;0!=(b+1);b--) {-
tmp*=(a-b);-
}-
return tmp;-
}-
-
-
int zuhe (int a,int b) {-
int c,d=1,e=1;-
c=b;-
for (--c;(c+1)!=0;--c) {-
d*=(a-c);-
}-
c=b;-
for (--c;(c+1)!=0;--c) {-
e*=(b-c);-
}-
return d/e;-
}-
-
int main (void) {-
int x,y,i,tmp,choose;-
printf("input 2 number\n");-
printf("the one=");-
scanf("%d",&x);-
printf("the two=");-
scanf("%d",&y);-
if (y>x){-
i=x;-
x=y;-
y=i;-
}-
do {-
printf("\n m A n input 1 \t m C n input 2 :");-
scanf("%d",&choose);-
} while (choose>2);-
-
print_date (x,y);-
-
switch (choose) {-
case 1:-
tmp = pailie (x,y);-
printf("\n n A m =%d\n",tmp);-
break;-
case 2:-
tmp = zuhe (x,y);-
printf("\n n C m =%d\n",tmp);-
break;-
}-
scanf("%d",&i);-
return 0;-
}-
作者: 51黑tt 时间: 2016-3-5 15:45
#include <stdio.h>
void print_date (const int a,const int b) {
printf("n = %d , m = %d",a,b);
}
int pailie (int a,int b) {
int tmp = 1;
for (b-=1;0!=(b+1);b--) {
tmp*=(a-b);
}
return tmp;
}
int zuhe (int a,int b) {
int tmp,c,d,e;
c=b;
for (c-=1;(c+1)!=0;c--) {
d*=(a-c);
}
c=b;
for (c-=1;(c+1)!=0;c--) {
e*=(b-c);
}
tmp = d/e;
return tmp;
}
int main (void) {
int x,y,i,tmp,choose;
printf("输入两个数字\n");
printf("第一个数字=");
scanf("%d",&x);
printf("第二个数字=");
scanf("%d",&y);
if (y>x){
i=x;
x=y;
y=i;
}
do {
printf("\n计算m A n输入1，计算m C n输入2 :");
scanf("%d",&choose);
} while (choose>2);
print_date (x,y);
switch (choose) {
case 1:
tmp = pailie (x,y);
printf("\n n A m =%d\n",tmp);
break;
case 2:
tmp = zuhe (x,y);
printf("\n n C m =%d\n",tmp);
break;
}
scanf("%d",&i);
return 0;
}