算法思維從0開始

1、三位數翻轉

#include<stdio.h>int main(){intn;scanf_s("%d",&n);PRintf_s("%d%d%d/n",n % 10, n / 10 % 10, n / 100);return0;}scanf_s  printf_s是新標準的函數 與沒有s是一樣的
2、交換兩個變量
#include<stdio.h>#include<stdlib.h>intmain(){int a,b;scanf_s("%d%d", &a,&b);//借助第三變量int t;t = a;a = b;b = t;printf_s("%d %d/n", a,b);//不借助a = a + b;b = a - b;a = a - b;printf_s("%d %d/n", a, b);//用異或a ^= b ^= a ^= b;printf_s("%d %d/n", a, b);system("pause");//此函數是運行了一個系統命令，讓命令行窗體暫停，此函數在stdlib.hreturn 0;}