c语言 7-11

1、

#include <stdio.h>

int main(void)
{
    float x1, sum1 = 0.0;
    for(x1 = 0.0; x1 <= 1.0; x1 += 0.01)
    {
        sum1 += x1;
    }
    
    int i;
    float sum2 = 0.0;
    for(i = 1; i <= 100; i++)
    {
        sum2 += (i / 100.0);
    }
    
    printf("sum1 = %f | sum2 = %f
", sum1, sum2);
    return 0;
}

2、

#include <stdio.h>

int main(void)
{
    int i;
    float x1 = -0.01, x2, sum1 = 0, sum2 = 0;
    for(i = 0; i <= 100; i++)
    {
        x1 += 0.01;
        x2 = i / 100.0;
        sum1 += x1;
        sum2 += x2;
        printf("x1 = %f | x2 = %f
", x1, x2);
    }
    printf("sum1 = %f | sum2 = %f
", sum1, sum2);
    
    return 0;
}

3、

#include <stdio.h>

int main(void)
{
    int  i;
    float x1, x2, sum1, sum2;
    x1 = sum1 = sum2 = 0.0;
    
    for(i = 0; i <= 100; i++)
    {
        x2 = i / 100.0;
        printf("x1 = %f | x2 = %f
", x1, x2);
        sum1 += x1; sum2 += x2;
        x1 += 0.01;
    }
    printf("sum1 = %f | sum2 = %f
", sum1, sum2);
    
    return 0;
}