摘要：#include <stdio.h> int main() { int num; scanf("%d", &num); printf("2049%04d\n", num); scanf("%d", &num); printf("2049%04d\n", num); scanf("%d", &num) 阅读全文

摘要：int x, y; // 定义两个整型变量，用来保存运算数据 int r1, r2, r3, r4; // 定义四个整型变量，用来保存加减乘除运算结果 x = 1; y = 2; r1 = x + y; r2 = x - y; r3 = x * y; r4 = x / y; printf("r1 = 阅读全文