C语言:函数处理结构体

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct namect{
        char fname[20]; //数组
        char *lname;    //指针
        int letters;
};

void getinfo(struct namect *);
struct namect makeinfo(struct namect);
void showinfo(struct namect *);

int main(){
        struct namect persion;
        getinfo(&persion);
        persion=makeinfo(persion);
        showinfo(&persion);
        return 0;
}

/**
 * 已指针方式传递结构体
 */
void getinfo(struct namect * pst){
        printf("Entenr you first name\n");
        gets(pst->fname);               //不读取\n，会留在输入缓冲区中呢
        //fgets(pst->fname,20,stdin);
        printf("Entenr you last name\n");
        //gets(pst->lname);
        char temp[100];
        gets(temp);
        pst->lname = (char *)malloc(strlen(temp)+1);
        strcpy(pst->lname,temp);
        //fgets(pst->lname,20,stdin);
}

/**
 * 传递结构体作为参数
 */
struct namect makeinfo(struct namect info){
        info.letters = strlen(info.fname) + strlen(info.lname);
        return info;
}

void showinfo(struct namect * pst){
        printf("%s %s,your name contains %d letters\n",pst->fname,pst->lname,pst->letters);
}