求f(x)=1-x的2次方的定积分

//求f(x)=1-x2的定积分#include <stdio.h>#include <stdlib.h>#include <time.h>#include <math.h>double p(int n){double x,y;time_t t;int i,count=0;srand((unsigned)time(&t));for(i=0;i<n;i++){x=rand()%100/100.0;y=rand()%100/100.0;if(y<=1-pow(x,2))count++;}return (double)count/(double)n; //求点落在f(x)=1-x2的图像在0到1区间内的概率}void main(){int n;printf("Please input the accuracy:");scanf("%d",&n);printf("The result is about:");printf("%f\n",p(n));getchar();}