汉扬编程 C语言入门 C语言 技能提升 系列文章(八)字符输入/输出

C语言 技能提升 系列文章(八)字符输入/输出

C语言 技能提升 系列文章(八)字符输入/输出

大家好,今天和大家聊一下字符的输入/输出。

// 从stream中读取字符int fgetc ( FILE * stream );int putc ( int character, FILE * stream );int getc ( FILE * stream );// 从stream中读取字符串char * fgets ( char * str, int num, FILE * stream );// 向stream中写入字符int fputc ( int character, FILE * stream );//int putc ( int character, FILE * stream );// 向stream中写入字符串int fputs ( const char * str, FILE * stream );// 从标准输入(stdio)读取一个字符int getchar ( void );// 从标准输入(stdio)读取一个字符串char * gets ( char * str );// putcharWrite character to stdout (function )putsWrite string to stdout (function )ungetcUnget character from stream (function )下面我们来看看实例代码。

#include <stdio.h>int main ( ) { FILE * pFile; int c; int n = 0; pFile=fopen ("myfile.txt","r"); if (pFile==NULL) perror ("Error opening file"); else { do { c = fgetc (pFile); if (c == '$') n++; } while (c != EOF); fclose (pFile); } return 0;}#include <stdio.h>int main(){ FILE * pFile; char mystring [100]; pFile = fopen ("myfile.txt" , "r"); if (pFile == NULL) perror ("Error opening file"); else { if ( fgets (mystring , 100 , pFile) != NULL ) puts (mystring); fclose (pFile); } return 0;}#include <stdio.h>int main (){ FILE * pFile; char c; pFile = fopen ("alphabet.txt","w"); if (pFile!=NULL) { for (c = 'A' ; c <= 'Z' ; c++) fputc ( c , pFile ); fclose (pFile); } return 0;}#include <stdio.h>int main (){ FILE * pFile; char sentence [256]; printf ("Enter sentence to append: "); fgets (sentence,256,stdin); pFile = fopen ("mylog.txt","a"); fputs (sentence,pFile); fclose (pFile); return 0;}#include <stdio.h>int main (){ int c; puts ("Enter text. Include a dot ('.')" " in a sentence to exit:"); do { c=getchar(); putchar (c); } while (c != '.'); return 0;}#include <stdio.h>int main(){ char string [256]; printf ("Insert your full address: "); // warning: unsafe (see fgets instead) gets (string); printf ("Your address is: %s\\n",string); return 0;}#include <stdio.h>int main () { char c; for (c = 'A' ; c <= 'Z' ; c++) putchar (c); return 0;}#include <stdio.h>int main () { char string [] = "Hello world!"; puts (string);}

今天的内容就这么多了,以上的内容虽然看起来简单。

但是,想要运用自如的话,还是需要大家勤加联系的。

如果大家觉得有帮助的话,欢迎点赞/关注!

本文来自网络,不代表汉扬编程立场,转载请注明出处:http://www.hyzlch.com/cjia/6707.html

调用浏览器访问指定网站(C语言)

C语言模拟实现设计模式(之原型模式)

发表评论

您的电子邮箱地址不会被公开。 必填项已用*标注

返回顶部