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#include<stdio.h>
x
马上注册,结交更多好友,享用更多功能^_^您需要 登录 才可以下载或查看,没有账号?立即注册  #include<stdbool.h>
 int get_int();
 bool bad_limits(int begin,int end,int low,int high);
 double sum_squares(int a,int b);
 int main()
 {
 const int MIN=-1000;
 const int MAX=+1000;
 int start;
 int stop;
 double answer;
 
 printf("This program computes the sum of the squares of "
 "integers in a range.\nThe lower bound should not "
 "be less than -1000 and \nthe upper bound should not"
 "be more than +1000\nEnter the limits(enter 0 for "
 "both limmits to quit):\nlower limit:");
 start=get_int();
 printf("upper limit:");
 stop=get_int();
 while(start!=0||stop!=0)
 {
 if(bad_limits(start,stop,MIN,MAX))
 printf("Please try again.\n");
 else{
 answer=sum_squares(start,stop);
 printf("The sum of the squares of the integers from");
 printf(" %d to %d is %g\n",start,stop,answer);
 }
 printf("Enter the limits(enter 0 for both to quit):\n");
 printf("lower:\n");
 start=get_int();
 printf("upper limit:");
 stop=get_int();
 }
 printf("Done.");
 return 0;
 
 }
 int get_int()
 {
 int input;
 char ch;
 
 while(scanf("%d",&input)!=1)
 {
 while((ch=getchar())!='\n')
 putchar();
 printf("is not an ingeter.\nPlease enter an\
 ingeter value,such as 25,-178,or 3:");
 }
 return input;
 }
 double sum_square(int a,int b)
 {
 double total=0;
 int i;
 for(i=a;i<=b;i++)
 total+=i*i;
 return total;
 }
 bool bad_limits(int begin,int end,int low,int high)
 {
 bool not_good=false;
 if(begin>end)
 {
 printf("$d isn't smaller than %d.\n",begin,end);
 not_good=true;
 }
 if(begin<low||end<low)
 {
 printf("value must be %d or greater.",low);
 not_good=true;
 
 }
 if(begin>high||end>high)
 {
 printf("Value must be %d or less.\n",high);
 not_good=true;
 }
 return not_good;
 }
 
 
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