counter.c

一种能实现各种复杂分数计算的小程序

 main() 
{ 
int a,b,c,d=1; 
while(d==1) 
{ 
printf("1.+\n2.-\n3.*\n4./\n5.clrscr and again\n6.exit\n"); 
printf("please choose a number(1-6)"); 
scanf("%d",&c); 
switch? 
{ 
case 1:printf("please input a,b\n"); 
 scanf("%d,%d",&a,&b); 
 printf("%d+%d=%d\n",a,b,a+b); 
 break; 
case 2:printf("please input a,b\n"); 
 scanf("%d,%d",&a,&b); 
 printf("%d-%d=%d\n",a,b,a-b); 
 break; 
case 3:printf("please input a,b\n"); 
 scanf("%d,%d",&a,&b); 
 printf("%d*%d=%d\n",a,b,a*b); 
 break; 
case 4:printf("please input a,b\n"); 
 scanf("%d,%d",&a,&b); 
 printf("%d/%d=%f\n",a,b,(float)a/b);break; 
case 5:clrscr();break; 
case 6:printf("quit\ndo you really want to quit\n");break; 
} 
printf("press 1 to continue.press 0 to exit>"); 
scanf("%d",&d); 
} 
}
 


























































































































































































                                                                                                                                                     //finished