100設計一甲_week13

#include<stdio.h>
void fun1(){
    int i=0;
    printf("while test1----\n");
    while(i<15){
        printf("%d\n",i);
        i++;
    }
    i=15;
    printf("while test2----\n");
    while(i){
        printf("%d\n",i);
        i--;
    }
    printf("for test1----\n");
    for(i=0;i<15;i++){
        printf("%d\n",i);
    }
}
int main(){
    int num1 = 123;
    float num2 = 3.14159;
    double num3 = 3.14159e-3;
    char name1[6] = {'h','e','l','l','o','\0'};
    char name2[6] = "hello";
    /*
    字串最後必須加上結束\0字元，代表字串結束
    hello 為五個字元 但最後必須加上\0，所以為六個字元。
    */
    printf("%d\n", num1);
    printf("%f\n", num2);
    printf("%e\n", num3);
    printf("%s\n", name1);
    printf("%s\n", name2);
    printf("%c\n", name1[1]);
    printf("%c\n", name2[1]);
    fun1();
    return 0;
}