C語言學習記錄_2019.02.09

• 列印字元串：%s--------printf(“%s”,”abcd”);
• 列印字元串數組中某一位：%c--------printf(“%c”,”abcd[2]”);
• 字元的定義及列印格式：

struct
    {
        int amount;
        char *name;
    }coins[] = 
    {
    {1,"one"},
    {2,"two"},
    {3,"three"}
    };

    char *abc="zxcvbnm";
    printf("%s\n",coins[2].name);
    printf("%s",abc);

 

• 字元串數組初始化；

char s1[]="array";  //字元數組

char s2[6]="array";  //數組長度=字元串長度+1，因為字元串末尾會自動添‘\0‘

printf("%s,%c\n",s1,s2[2]);  //array，r

• 字元串指針初始化；

char *sp="pointer";  //字元指針

printf("%s,%c,%c\n",sp,*sp,*(sp+2));  //pointer,p,i

• 數組+scanf

char s1[6];    

scanf("%s\n",s1);

printf("%s,%c\n",s1,s1[2]);  //array，r

• 指針+數組+scanf

char str[60], *sp=str;//將數組的首地址str賦給指針變數sp

scanf("%s\n",sp);

printf("%s,%c,%c\n",sp,*sp,*(sp+3));//pointer,p,n

printf("%s,%c,%c\n",str,str[0],str[3]);//pointer,p,n

• 使用scanf對結構體進行賦值；

#include<stdio.h>
struct student
{
    int num;
    char name[10];
};
void main()
{
    struct student s;
    printf("輸入學號：\n");
    scanf("%d",&s.num);//scanf賦值給結構體的num成員
    printf("輸入姓名：\n");
    scanf("%s",&s.name);
    printf("輸入的信息為：學號：%d,姓名：%s\n",s.num ,s.name);
}

• 輸入數據語句的格式：scanf（“%d”,&x);
• char*:字元指針類型