抄了一个打印设定上下范围的所有整数的平方和程序！
#include <stdio.h>#include <stdbool.h>
long get_long(void);
bool bad_limits(long begin, long end, long low, long high);
double sum_squares(long a, long b);
int main(void) {
const long MIN = -10000000L;
const long MAX = +10000000L;
long start;
long 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 -10000000 and\nthe upper bound"
"should not be more than +10000000.\nEnter the"
"limits (enter 0 for both limits to quit);\n"
"lower limit: ");
start = get_long();
printf("upper limit: ");
stop = get_long();
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 square of the integers ");
printf("from %ld to %ld is %g\n", start, stop, answer);
}
printf("Enter the limits(enter 0 for both limits to quit):\n");
printf("lower limit: ");
start = get_long();
printf("upper limit: ");
stop = get_long();
}
printf("Done!.\n");
return 0;
}
long get_long(void) {
long input;
char ch;
while (scanf("%ld", &input) != 1) {
while ((ch = getchar()) != '\n')
putchar(ch);
printf(" is not an integer.\nplease enter an ");
printf("integer value,such as 25,-178,or 3: ");
}
return input;
}
bool bad_limits(long begin, long end, long low, long high) {
bool not_good = false;
if (begin > end) {
printf("%ld isn't smaller than %ld .\n", begin, end);
not_good = true;
}
if (begin < low || end < low) {
printf("Values must be %ld or greater.\n", low);
not_good = true;
}
if (begin > high || end > high) {
printf("Values must be %ld or less", high);
not_good = true;
}
return not_good;
}
double sum_squares(long a, long b) {
double total = 0;
long i;
for (i = a; i <= b; i++)
total += (double)i * (double)i;
return total;
}
[此贴子已经被作者于2022-4-20 18:40编辑过]
