#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 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\)