用 C 程序解释文件结尾 (EOF)
文件结束(EOF)表示输入的结束。
在我们输入文本后，如果我们按ctrl+Z，文本将终止，即它表示文件已到达结尾，没有可阅读的内容。
算法
请参阅下面给出的EOF算法。
Step 1: Open file in write mode. Step 2: Until character reaches end of the file, write each character in filepointer. Step 3: Close file. Step 4: Again open file in read mode. Step 5: Reading the character from file until fp equals to EOF. Step 5: Print character on console. Step 6: Close file.
示例
以下是文件结束(EOF)的C程序-
#include输出结果int main(){ char ch; FILE *fp; fp=fopen("std1.txt","w"); //以写模式打开文件 printf("enter the text then press cntrl Z:\n"); while((ch = getchar())!=EOF) //逐个字符读取字符直到它等于EOF{ i.e. when u press ctrlZ the while loop terminates putc(ch,fp); } fclose(fp); fp=fopen("std1.txt","r"); printf("text on the file:\n"); while ((ch=getc(fp))!=EOF) //从文件中读取字符直到fp等于EOF{ putchar(ch); } fclose(fp); return 0; }
执行上述程序时，会产生以下结果-
enter the text then press cntrl Z: This is the EOF demonstration example if your text typing is over press cntrlZ ^Z text on the file: This is the EOF demonstration example if your text typing is over press cntrlZ