c语言4-2 输入两个整数的值，然后计算这两个数之间所有整数的和

 

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);
    
    if (a > b)
    {
        min = b;
        max = a;
    }
    else
    {
        min = a;
        max = b;
    }
    
    do
    {
        sum += min;
        min++;
    }
    while (min <= max);
    
    printf("sum = %d\n", sum);
    return 0;
}

或者

#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;
}

 

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1、do语句

#include <stdio.h>

int main(void)
{
    int i, j, min, max, sum = 0;
    puts("please input two integer.");
    printf("i = "); scanf("%d", &i);
    printf("j = "); scanf("%d", &j);
    
    if ( i > j)
    {
        max = i;
        min = j;
    }
    else
    {
        max = j;
        min = i;
    }
    
    do
    {
        sum += min;
        min++;
    }
    while (min <= max);
    
    printf("sum = %d\n", sum);
    
    return 0;
}

↓

#include <stdio.h>

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

↓

#include <stdio.h>

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

 

3、for语句

#include <stdio.h>

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

↓

#include <stdio.h>

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