程序如下：
#include
#include
#include"string"
int save_ps() ;
int load_ps() ;
struct Car
{
std::string maker ;
float price ;
};
struct Citizen
{
std::string name ;
float deposite ;
Car *car ;
};
int main()
{
save_ps() ;
//load_ps() ;
return 0 ;
}
int save_ps()
{
const char* filename = "inputdataps.txt" ;
FILE* fp = fopen(filename,"wb") ;
if ( fp == NULL )
{
std::cerr << "Can not open the file ! " << std::endl ;
return -1 ;
}
Car *car = (Car *) malloc (sizeof(Car)) ;
car->maker = "BMW" ;
car->price = 2000 ;
Citizen man = { "feng" , 200000 } ;
man.car = car ;
fwrite(&man.name,1,sizeof(man.name),fp) ;
fwrite(&man.deposite,1,sizeof(man.deposite),fp);
if ( man.car != NULL )
{
fwrite ( "Y" , 1 , 1 , fp ) ;
fwrite ( &man.car->maker , 1 , sizeof( man.car->maker ) , fp ) ;
fwrite ( &man.car->price , 1 , sizeof( man.car->price ) , fp ) ;
}
else
{
fwrite ( "N" , 1 , 1 , fp ) ;
}
fclose(fp) ;
return 0 ;
}
int load_ps()
{
const char* filename = "save_ps.txt" ;
FILE* fp = fopen(filename,"rb") ;
if ( fp == NULL )
{
std::cerr << "Can not open the file ! " << std::endl ;
return -1 ;
}
Citizen man ;
fread(&man.name , 1 , sizeof(man.name) , fp) ;
fread(&man.deposite , 1 , sizeof(man.deposite) , fp) ;
char has_car_YN = 'N' ;
fread( &has_car_YN , 1 , sizeof(has_car_YN) , fp ) ;
if ( has_car_YN == 'Y' )
{
Car *car = (Car*) malloc(sizeof(Car)) ;
fread(&car->maker,1,sizeof(car->maker),fp) ;
fread(&car->price,1,sizeof(car->price),fp) ;
}
else
{
man.car = NULL ;
}
fclose(fp);
}
主要的问题好像出现在save_ps()里边，只是运行了这个函数就崩了...
各位大神，帮小弟分析下好吗？
