Question

使用函数嵌套调用完成计算∑n!n∈[1,20] c语言编程

Answer 1

#include#includelonglongFact(intn){if(n==1)return1;returnn*Fact(n-1);}voidmain(){intn;longlongx=0;scanf("%d",&n);while(n>0)x+=Fact(n--);printf("\nx=%d\n",x);}