#include <stdio.h>#include <stdlib.h>struct point_type //结构体放外面{ double x;double y;double z;};void main(){ FILE *fp1;double x1=0,y1=0,x1_x1=0,x1_y1=0;int n;int i;printf("input n 展开
#include <stdio.h>#include <stdlib.h>struct point_type //结构体放外面{ double x;double y;double z;};void main(){ FILE *fp1;double x1=0,y1=0,x1_x1=0,x1_y1=0;int n;int i;printf("input n\n");//输6 scanf("%d",&n);struct point_type point[3000];if((fp1=fopen("e:\\abc.txt","r"))==NULL) //这里是你的txt文件地址 { printf("cant not open file");exit(1);} for(i=0;i<n;i++) { fscanf(fp1,"%lf %lf",&point[i].x,&point[i].y);//这里不用加point[i] x1+=point[i].x;y1+=point[i].y;x1_y1+=point[i].x*point[i].y;x1_x1+=point[i].x*point[i].x;printf("%lf %lf\n",point[i].x,point[i].y);//不知道你要输出什么如果要控制台输出地话，就用printf，要写到另一个文件用fprintf } fclose(fp1);}这样你看一下，要什么具体要求就要你自己改了。 收起
