【C语言程序设计第四版】练习12-5

写字符并验证

#include <stdio.h>
#include <stdlib.h>
#define MAXN 300


int main(void){
    
    FILE *fp;
    char ch;
    
    char string[MAXN];
    
    gets(string);
    
    if ((fp=fopen("f3.txt", "w+")) == NULL) {
        printf("File open errpr!
");
        exit(0);
    }
    fputs(string, fp);
    rewind(fp);
    
    while ((ch=fgetc(fp))!=EOF) {
        putchar(ch);
    }
    
    if ((fclose(fp))) {
        printf("Can not close the file!
");
        exit(0);
    }

    return 0;
}