取消对NULL指针xxx的引用

[010100100000CS]

#include<stdio.h>
void splitfloat(float x, int* intpart, float* fracpart) {
float number;
int count = 0;
number = x;
while (number >= 1) {
count++;
number -= 1;
}
intpart = &count;
fracpart = &number;
*intpart = count;
*fracpart = number;
}
int main(void)
{
float x, * fracpart1;
int* intpart1;
scanf_s("%f", &x);
fracpart1 = 0;
intpart1 = 0;
splitfloat(x, intpart1, fracpart1);
printf("intpart is %d,fracpart is %f", *intpart1, *fracpart1);
return 0;
}

大佬们能把我看下吗？

[Simple-Soft]

临时变量地址赋给了指针

[ikaoni]

楼上说得对。代码稍微修改了一下。

#include<stdio.h>

void splitfloat(float x, int *intpart, float *fracpart) {
    int count = 0;
    while (x >= 1) {
        count++;
        x -= 1;
    }
    *intpart = count;
    *fracpart = x;
}
int main(void)
{
    float x, fracpart1;
    int intpart1;
    printf("Enter a number: ");
    scanf_s("%f", &x);
    splitfloat(x, &intpart1, &fracpart1);
    printf("intpart is %d, fracpart is %f\n", intpart1, fracpart1);
    return 0;
}

[自信男孩]

inputpart1指向了局部变量，因为局部变量的生命周期是从定义开始到函数返回结束，因此输出已经无效的局部变量是未定义性行为～