<span style="font-size:24px;">#include<stdio.h>void print_menu(){printf("*********************\n");printf("***1.add2.sub***\n");printf("***3.mul4.div***\n");printf("*********************\n");}int add(int x,int y){return x+y;}int sub(int x,int y){return x-y;}int mul(int x,int y){return x*y;}int div(int x,int y){return x/y;}int main(){int m,n;int input=1;while(input){print_menu();printf("请选择>");scanf("%d",&input);printf("请输入俩个操作数：");scanf("%d %d",&m,&n);switch(input){case 1:printf("%d\n",add(m,n));break;case 2:printf("%d\n",sub(m,n));break;case 3:printf("%d\n",mul(m,n));break;case 4:printf("%d\n",div(m,n));break;default:return 0;break;}}</span>
，当你能梦的时候就不要放弃梦
