有以下程序 #include ＜stdio.h＞ main() {FILE *fp; int i; char ch[]="abcd",t; fp=fopen("abc.dat","wb＋＋"); for(i=O;i＜4;i＋＋)fwrite(&ch[i],1,1,fp); fseek (fp,-2L,SEEK_END); fread (&t,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
参考答案：A
解析：
此题考核的是文件的读写，定义—个FILE类型结构体的指针fp，以“可以由位置函数设置读和写”方式打开一个 abc.dat文件，并向文件输入数组变量ch指向的字符串，则文件内的内容为“abcd”，执行fseek函数，则文件类型指针fp指向文件尾向前移动2个字节的位置处，即指针指向“b”，所以最后的输出结果为b，答案选C。
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| Here is a story about a clever dog. It was a seeing-eye dog. A seeing-eye dog can help blind (瞎的) people walk along the streets and do many other things. One day a seeing-eye dog and a blind man 1 on bus together. The bus was full of 2 and there were 3 seats left. But one man soon stood up and left his seat. The dog 4 the blind man to the seat, but there was little space (空间) for two people. The dog began to push the people on each side 5 his nose. He pushed and pushed until the people moved and 6 there was 7 space for two people. The blind man then sat down and the dog got up on the seat at his side. The dog 8 down and put his head on the leg of the 9 man. He was very comfortable and soon fell asleep. Everyone on the bus 10 at the dog. | ||||
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