有以下程序 #include main () {FILE *fp; int i,a[6]={1,2,3,4,5,6k}; fp=fopen(“d3.dat”,”w+b”); fwrite(a,sizeof(int),6,fp); fseek(fp,sizeof(int)*3,SEEK_SET);/*该语句使读文件的位置指针从文件头向后移动3个int型数据*/ fread(a,sizeof(int),3,fp); fclose(fp); for(i=0;i<6;i++) printf(“%d,”,a[i]); }
程序运行后的输出结果是( )。
A.4,5,6,4,5,6,
B.1,2,3,4,5,6,
C.4,5,6,1,2,3,
D.6,5,4,3,2,1,
第1题:
有以下程序:#include <stdlo.h>main( ){ 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);
A.0 0
B.123 45
C.1 4
D.1
第2题:
有以下程序 #include<stdio.h> main() {FILE *fp;int i=20,j=30,k,n; fp=fopen("d1.dat","w"); fprintf(fp,"%d\n",i;fprintf(fp,"%d\n",j); fclose(fp); fp=fopen("d1.dat","r"); fscanf(fp,"%d%d",&k,&n);printf("%d%d\n",k,n); fclose(fp);} 程序运行
A.20 30
B.20 50
C.30 50
D.30 20
第3题:
有以下程序
#include <stdio.h>
main( )
{ FILE *fp;int i,a[6]={1,2,3,4,5,6};
fp=fopen("d3.dat","w+b");
fwrite(a,sizeof(int),6,fp);
fseek(fp,sizeof(int)*3,SEEK_SET);/*该语句使读文件的位置指针从文件头向后移动3个int型数据*/
fread(a,sizeof(int),3,fp);fclose(fp);
for(i=0;i<6;i++)printf("%d,",a[i]);
}
程序运行后的输出结果是
A.4,5,6,4,5,6,
B.1,2,3,4,5,6,
C.4,5,6,1,2,3,
D.6,5,4,3,2,1,
第4题:
有以下程序: #include <stdio.h> main() {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); } 程序运行后的输出结果是 ______。
A.0 0
B.123 45
C.1 4
D.1 2
第5题:
有以下程序: #include<stdio.h> main() {FILE *fp;int i,a[6]={1,2,3,4,5,6}; fp=fopen("d2.dat","w"); fprintf(fp,"%d%d%d\n",a[0],a[1],a[2]); fprintf(fp,"%d%d%d\n",a[3],a[4],a[5]); fclose(fp); fp=fopen("d2.dat","r"); fscanf(fp,"%d%d\n",&k,
A.1 2
B.1 4
C.123 4
D.123 456