typedef struct {
int id;
char *namea;
}SD;
namea没有分配内存
可以改为
typedef struct {
int id;
char namea[50];
}SD;
sda[j-1].namea=string;不可以这么写
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_NUM 50
int tline; //ﾐﾐﾊ
typedef struct {
int id;
char namea[50];
}SD;
int main()
{
int n=1,k=0,j=0; //nｱ桄ｾﾎﾄｼﾐﾐﾊ｣ｬjｱ桄ｾｽ盪ｹﾌ衢｣ｨｴﾓ1ｿｪﾊｼ｣ｩﾋﾔﾔﾚｸｳﾖｵﾊｱﾊｹﾓﾃj-1｡｣
FILE *fp;
SD sda[MAX_NUM];
char string [50];
if((fp=fopen("fprintf.out","r"))==NULL){
perror("sth wrong about open file");
exit(-1);
}
while(fgets(string,50,fp)!=NULL) {
if(n==1) {tline=atoi(string); n++;}
else{
j=n/2;
if ((n%2)==0){ //ﾈ郢鈹ﾇﾅｼﾊﾋｵﾃﾚｶﾁid
sda[j-1].id=atoi(string);
printf("j : %d \t n : %d \t sda[%d].id :%d\n",j,n,j-1,sda[j-1].id);
n++;
}
else //ﾆ賁ﾊﾇnamea
{
//sda[j-1].namea=string;
strcpy( sda[j-1].namea, string );
printf("j : %d \t n : %d \t sda[%d].namea :%s\n",j,n,j-1,sda[j-1].namea);
n++;
}
}//else
}
printf("the file has %d lines \n",tline);
printf("the %d student info list \n",(tline-1)/2);
for(k=0;k<=(tline-1)/2-1;k++)
{
printf("id : %d\tthe name :%s\n",sda[k].id,sda[k].namea);
}
system("pause");
return 0;
}
