年龄不应该是整型变量一个么,然后2-3,4,5-6用if-else if-else if来表示就可以了。
#include <stdio.h>int main()
{
int age
printf ("Please input age:")
scanf ("%d", &age)
if(age>=2&&age<=3)printf ("Class: small class\n")
else if(age==4)printf ("Class: middle class\n")
else if(age>=5&&age<=6)printf ("Class: top class\n")
return 0
}
#include <stdio.h>void main()
{
int n = 1
int i
int sum = 0
for(i = 10i >= 1i--)
{
sum += n
n = (n+1)*2
}
printf("总共有糖%d颗\n",sum)
}