#include<stdio.h>
#include<string.h>
int main()
{
int m=3, n=4;
float h(int B, int D), z;
z = h(m, n);
printf("结果为%f\n", z);
}
float h(int B, int D)
int G(int F);
float E;
E = G(D) / (G(B)*G(D - B));
return (E);
int G(int F)
int num1,i;
num1 = 1;
for (i = F;i <= 1;i--)
num1 = num1*i;
return (num1);
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