c语言中do语句；输入两个整数，计算它们之间的所有整数的和

c语言中程序的循环控制，do语句输入两个整数，计算它们之间的所有整数的和。

1、do语句

#include <stdio.h>

int main(void)
{
    int a, b, min, max, sum = 0;
    puts("please input two integers.");
    printf("a = "); scanf("%d", &a);
    printf("b = "); scanf("%d", &b);
    min = a > b ? b:a;
    max = a > b ? a:b;
    do
    {
        sum += min;
        min++;
    }
    while(min <= max);
    
    printf("sum = %d\n", sum);
    return 0;
}

2、while语句

#include <stdio.h>

int main(void)
{
    int a, b, min, max, sum = 0;
    puts("please input two integers.");
    printf("a = "); scanf("%d", &a);
    printf("b = "); scanf("%d", &b);
    min = a > b ? b:a;
    max = a > b ? a:b;
    while(min <= max)
    {
        sum += min;
        min++;
    }
    printf("sum = %d\n", sum);
    return 0;
}

3、for语句

#include <stdio.h>

int main(void)
{
    int a, b, min, max, sum = 0;
    puts("please input two integers.");
    printf("a = "); scanf("%d", &a);
    printf("b = "); scanf("%d", &b);
    min = a > b ? b:a;
    max = a > b ? a:b;
    for(min; min <= max; min++)
    {
        sum += min;
    }
    printf("sum = %d\n", sum);
    return 0;
}