#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 stdio. h\ #include\math. h' void maino c, P, xI, X2, real, imag printf(“请输入一元二次方程的三个系数:”); scanf(\%f%f%f\, &a, &b, &c)

#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 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 #define null o FILE*fp; float f1 f2f3 if(fp=fopen(\e: paper. dat\, \wb\)NULL) printf\无法打开文件!mn\)

*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]

for(=0 j