#includestdio h float char oper printi“请输入两个数和一个四则运算符(如:3,+,2):”) scanf(\%f,%c, %f\, &operandi, &oper, &operand2 )

#include void maino Int x, y, 2, printf(\请输入三个整数xy,z:\) scanf(\%d%d%d\, &x, &y, &z)

#include #include void maino float x, y, z, q, area; printf(\请输入三角形的三条边:\)

#include #define NULL void proerr(Ffile*fp)/*错误测试与处理的通用函数*

#include #include void maino FILE* fp long i if(fp=fopen(\e: M\\alphabet txt\, rb\)=NULL printf(\文件打开时出错!in\)

#include void maino FILE'fpl, fp2; fpl= fopen(\e: Aname txt\,\r\),/*只读打开文件 name. txt fp2=fopen(\e: name. bak\, \W\); while( feof(fpl)

include include struct student/*定义结构体类型 student及数且s* char number 6 char name[201

#include maino FILE ip nar str[11]; if(fp= fopen(\e: Mname. txt\,\r\)==NULL)以只读方式打开 name. txt文件* printf\hn无法打开文件 name txt!m\)

*极限俱乐部会员信息系统* #include \stdio h\ #include \string. h #define Len sizeof (struct staff) /自动求取staf结构的字节长度* struct staft char unit[601 char name[20]

#include #include void main( void char ch, filename[ 40], mode [4] *输入文件名和模式* printf(\hn请输入一个文件名:\