源代码
#include
int main()
{
double a,b,s;
char c;
while(scanf("%lf%c%lf",&a,&c,&b...,a,c,b,s);
}
else if(c=='-')
{
s=a-b;
printf("%.2lf%c...c=(a+b)*0.54*k;
if(ch2=='y')
c*=1.02;
if(ch3=='y')
c*...,从键盘输入一个c(00 && c<0)
printf("%d/%d>%d/%d",a,b,c,d);
if(a0)
printf("%d