语言基础——IO

C：#include <stdio.h> <stdlib.h>

输出输入printfscanfint fputc(int c,FILE *p)int fgetc(FILE *p)int fputs(char *s,FILE *p)char *fgets(char *s,int n,FILE *p)int putc(int c,FILE *p)int getc(FILE *p)int putchar(int c)=putc(c,stdout)int getchar(void)=putc(c,stdout)int puts( const char *s)char *gets(char *s)//不安全，不使用 fread(void* arr,sizeof(arr_type),int array_len,FILE *p)fwrite(void* arr,sizeof(arr_type),int array_len,FILE *p)
fprintf(FILE *p,"")fscanf(FILE *p,"....")FILE *fp=fopen("1.txt","a+") fclose(fp)其他辅助函数:

fseek(FILE *p,count,SEEK_CUR/SET/END)

long ftell(FILE *p)
int fgetpos(FILE *p,fpos_t *ptr)

int fsetpos(FILE *p,fpos_t *ptr)

C++：#include <iostream> <fstream>

输出输入ofstreamifstream  fstream

stream.open("1.txt",ios::app)//ios::ate...

stream.close()

stream.put(char c);

stream.get(char c)

stream.write(buf,sizeof buf);

stream.getline(buf,n,'\n')//输入流

stream.read(buf,sizeof buf)

stream.good();

stream.eof()

输入流：ifstream.seekg(count,ios::beg)/seekg(-5);

                ifstream.seekg(streampos p2);//p2=tellg()

输出流：ofstream.seekp(...)同上

peek()//返回下一个字符的asc码

作业1.去除字符串中单词之间多余的空格。输入和输出。