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单选题 若有语句:FILE *fp;fp=fopen("d:\\data.txt","w");要向data.txt文件中写入数据56,应使用语句()
学科：高级语言程序设计
时间：2023-10-29 16:28:49
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题目1单选题
若已定义:FILE *fp;int a;要从fp所指向的文件中读取一个整型数据给变量a,应使用语句()A. fscanf(fp,a)B. fscanf(fp,"%d",&a)C. scanf(fp,"%d",a)D. fscanf(fp,"%d",a)
题目2单选题
操作方式字符串()表示只读取文件fp所指向文件中的数据A. "r"B. "a"C. "wb"D. "w"
题目3单选题
若有语句:FILE *fp;fp=fopen("d:\\data.txt","w");要向data.txt文件中写入数据56,应使用语句()A. fprintf("%d",56)B. fprintf(fp,"%d",56)C. fprintf(fp,56)D. printf(fp,"%d",56)
题目4单选题
以下程序运行后,data.txt文件中的内容是()#include "stdio.h"int main(){FILE *fp;int a=15,b;fp=fopen("d:\\data.txt","w");fprintf(fp,"%d,",a);b=a+10;fprintf(fp,"%d\n",b);fclose(fp);getch();return 0;}A. 15B. 25,15C. 15,25D. 25
题目5单选题
以下程序的运行结果是()#include "stdio.h"int main(){FILE *fp;int a=3,b=2,c=1,x,y,z;fp=fopen("d:\\data.txt","w");fprintf(fp,"%d,%d,%d",a,b,c);fclose(fp);fp=fopen("d:\\data.txt","r");fscanf(fp,"%d,%d",&x,&y);fclose(fp);z=3*x-y;printf("%d\n",z);getch();return 0;}A. 0B. 1C. 5D. 7
题目6单选题
以下程序的运行结果是()#include <stdio.h>void main(){ FILE *fp; int a=3,b=5,x=0,y=0,z; fp=fopen("test.txt","w"); fprintf(fp,"%d\n%d",a,b); fclose(fp); fp=fopen("test.txt","r"); fscanf(fp,"%d%d",&x,&y); z=x+y; printf("%d\n",z); fclose(fp); }A. 8B. 5C. 0D. 3
题目7单选题
fscanf()函数的正确调用形式是()A. fscanf(格式字符串,文件指针,输入表列)B. fscanf(格式字符串,输入表列,文件指针)C. fscanf(文件指针,格式字符串,输入表列)D. fscanf(文件指针,输入表列,格式字符串)
题目8单选题
对已打开的文件操作完成后,应使用()将文件关闭A. close()函数B. fclose()函数C. closefile()函数D. openfile()函数
题目9单选题
以下程序执行后,文件test.txt的内容是()#include <stdio.h>void main(){FILE *fp;fp=fopen("test.txt","w");fprintf(fp,"%s","How ");fclose(fp);fp=fopen(test.txt","a");fprintf(fp,"%s","are you!");fclose(fp);}A. How are youB. HowC. youD. are you
题目10单选题
若文本文件data.txt的内容是Hotel,以下程序段的运行结果是().FILE *fp;char str[10];fp=fopen("data.txt","r");fgets(str,4,fp);printf("%s",str)A. HotelB. HotC. HoD. Hote
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