下面程序的输出结果是________。#include<;stdio.h>;int main( ){ FILE *fp; int n,a[2]={65,66}; char ch; fp=fopen("d.dat","w"); fprintf(fp,"%d%d",a[0],a[1]); fclose(fp); fp=fopen("d.dat","r"); fscanf(fp,"%c",&ch); n=ch; while(n!=0){printf("%d",n%10);n=n/10;} fclose(fp); return 0;}

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2022-06-16

下面程序的输出结果是________。#include<;stdio.h>;int main( ){ FILE *fp; int n,a[2]={65,66}; char ch; fp=fopen("d.dat","w"); fprintf(fp,"%d%d",a[0],a[1]); fclose(fp); fp=fopen("d.dat","r"); fscanf(fp,"%c",&ch); n=ch; while(n!=0){printf("%d",n%10);n=n/10;} fclose(fp); return 0;}

答案：

45

举一反三

内容

0
下列程序的输出结果是（） int main(void) { FILE *fp; int i,k,n; fp=fopen("data.dat","w+"); for(i=1;i<6;i++) { fprintf(fp,"%d",i); if(i%3==0) fprintf(fp,"\n"); } rewind(fp); fscanf(fp,"%d%d",&k,&n); printf("%d%d\n",k,n); fclose(fp); return 0;}
1
有以下函数：voidf(){FILE*fp;inti,n=0,k=0;fp=fopen(“source.txt”,”w”);for(i=0;i<5;i++)fprintf(fp,”%d”,i);fclose(fp);fp=fopen(“source.txt”,”r”);fscanf(fp,”%d%d”,&n,&k);printf(“%d,%d”,n,k);fclose(fp);}输出结果为()
2
有以下程序#include "stdio.h"main(){ FILE *fp; int i, a[6] = {1,2,3,4,5,6}, k; fp = fopen("data.dat", "w+b"); fwrite(&a[0], sizeof(int), 1, fp); for (i=1; i<6; i++) { fseek(fp, 0L, 0); fwrite(&a[i], sizeof(int), 1, fp); } fseek(fp, 0L, 0); fread(&k, sizeof(int), 1, fp); fclose(fp); printf("%d\n", k);}程序运行后的输出结果是______。[/i] A: 6 B: 21 C: 123456 D: 654321
3
有以下程序： #include ＜stdio.h＞ main() { FILE*fp; int i,a[6] = {1,2,3,4,5,6},k; fp = fopen("data.dat", "w+b"); fwrite(&a[0],sizeof(int),1,fp); for(i=1; i＜6; i++) { fseek(fp, 0L, 0); fread(&k, sizeof(int), 1, fp); fseek(fp, 0L, 0); a[i] +=k; fwrite(&a[i], sizeof(int), 1, fp); } rewind(fp); fread(&k, sizeof(int), 1, fp); fclose(fp); printf("%d\n",k); } 程序的运行结果是______。[/i][/i] A: 21 B: 6 C: 123456 D: 11
4
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: 15 B: 25,15 C: 15,25 D: 25