c语言:用一个·txt文件存20个数字,然后用程序编写:从这些数字里任选一个...答:include<stdio.h> main(){ FILE *fp;int a[20],i=0,t;int j, b[20],cnt=0,guard=1;fp=fopen("numbers.txt","r");for(i=1;i<=20;i++)fscanf(fp,"%d\t",&a[i]);fclose(fp);printf("Please select a number(1~20):");scanf("%d",&t);while(1){ printf("Please ...