當結構體字符串重疊

Question

我編寫了一個代碼來輸入學生信息，如下所示。出現該問題時，學生ID追加Lastname.I知道錯誤在於進入ID和姓氏，但我不明白，並修復它

#include "stdio.h" 
#include "string.h" 
typedef struct Fullname_s{ 
    char Lastname[20]; 
    char Fistname[10]; 
}Fullname; 
typedef struct Birthday_s{ 
    int Day,Month,Year; 
}Birthday; 
typedef struct Mark_s{ 
    float mark[10]; 
}Mark; 
typedef struct SV{ 
    char ID[8]; 
    Fullname F_name; 
    Birthday B_day; 
    char Sex[5]; 
    Mark _Mark; 
}sv; 
sv s[100]; 
void inputsv(sv s[],int *n); 
void printinfo(int i); 
void output(sv s[],int n); 
int main(){ 
    int n; 
    inputsv(s,&n); 
    output(s,n); 
} 

void inputsv(sv s[],int *n){ 
    printf("--------Enter Students information--------\n"); 
    printf("Enter number of students \n"); 
    scanf("%d",n); 
    int i=0; 
    while(i<*n){ 
     int x; 
     printf("-------------------------Student %d-------------------------- \n",i+1); 
     printf("ID Student : "); 
     fflush(stdin); 
     scanf("%s",&s[i].ID); 
     gets(); 
     printf(" Lastname : "); 
     fgets(s[i].F_name.Lastname,20,stdin); 
     printf(" Fistname : "); 
     gets(s[i].F_name.Fistname);  
     do{ 
      puts("Enter 0 :MALE"); 
      puts("Enter 1 :FEMALE"); 
      scanf("%d",&x); 
      if(x==0) 
       strcpy(s[i].Sex,"MALE"); 
      else 
       strcpy(s[i].Sex,"FEMALE"); 
     }while(x!=0&&x!=1); 
     printf(" Birthday : "); 
     scanf("%d%d%d",&s[i].B_day.Day,&s[i].B_day.Month,&s[i].B_day.Year); 
     for(int j=0;j<10;j++){ 
     printf(" Mark %2d:",j+1); 
     scanf("%f",&s[i]._Mark.mark[j]); 
     } 
     i++; 
     gets(); 
    } 
} 

void output(sv s[],int n){ 
    printf("STUDENTS INFORMATION \n"); 
    for(int i=0;i<n;i++){ 
     printf("--------------------\n"); 
     printf(" STUDENT %2d\n",i+1); 
     printinfo(i); 
     printf("-------------\n"); 
     } 
    printf("------------------------\n"); 
} 

void printinfo(int i){ 
    printf(" ID STUDENT :%s\n",s[i].ID); 
    printf(" FULLNAME :%s %s  \n",s[i].F_name.Lastname,s[i].F_name.Fistname); 
    printf(" BIRTHDAY :%2d-%2d-%4d \n",s[i].B_day.Day,s[i].B_day.Month,s[i].B_day.Year); 
    printf(" SEX   :%s\n",s[i].Sex); 
    for(int j=0;j<10;j++){ 
     printf(" MARK %2d : %0.2f \n",j+1,s[i]._Mark.mark[j]); 
    } 
} 

錯誤作爲picture.Thanks所有 enter image description here

Answer 1

請注意0​​被定義爲char ID[8]。不過，輸入的ID是1234567b這是8個字符。如果ID應該是1234567，那麼你忽略了放入\0 NULL字符來結束字符串。結果printf(" ID STUDENT :%s\n",s[i].ID);從s[i].ID開始打印，直到第一個空字符（名稱末尾）。