更多"有以下程序 #include<stdio.h> #include<"的相关试题:
[单项选择]有以下程序
#include
main( )
{FILE *fp; int i;
char ch[]="abcd",t;
fp=fopen("abc.dat", "wb+");
for(i=0;i<4;i++)fwrite(&ch[i],1,1,fp);
fseek(fp,-2L,SEEK_END);
fread(&,1,1,fp);
fclose(fp);
printf("%c\n",t);
}
程序执行后的输出结果是【 】。
A. d
B. c
C. b
D. a
[填空题]
以下程序运行后的输出结果是()。
#include
#include
#include
main( )
{ char *p;int i;
p=(char*)malloc(sizeof(char)*20);
strcpy(p,"welcome");
for(i=6;i>=0;i--) putchar(*(p+i));
printf("/n"); free(p);
}
[单项选择]有以下程序
#include
main( )
{struct STU{char name[9];char sex;double score[2]; };
struct STU a={"Zhao",m’’,85.0,90.0},b={"Qian",f’’,95.0,92.0};
b=a:
printf("%s,%c,%2.0f,%2.0f/n",b.name,b.sex,b.score [0],b.score[1]);
}
程序的运行结果是
A. Qian,f,95,92
B. Qian,m,85,90
C. Zhao,f,95,92
D. Zhao,m,85,90
[单项选择]有以下程序
#include
main( )
{FILE * fp;int k , n,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[S]);
fclose(fp);
fp=fopen("d2.dat","r");
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. 12
B. 14
C. 1234
D. 123456