像编写一个求n个数平均数的程序,但是测试的时候出现了Segmentation fault错误,不知道怎么改,求大神纠正,以下是程序,谢谢!!!

#include <stdio.h>
#include <math.h>

int main(void) {
    int n, m, sum;
    int a[n];
    double average;
    
    printf("Enter n: ");
    scanf("%d", &n);
    printf("Enter numbers: "); 
    
    for(m = 0; m <= n; m++){   
        scanf("%d", &a[n]); 
        sum+=a[m];
    }
    
    average = sum / n;
    printf("average = %1.2lf\n", average);
    
    return 0;
}        

#include <stdio.h>
#include <math.h>

int main(void) {
    int n, m, sum = 0;
    int a[n];
    double average;
   
    printf("Enter n: ");
    scanf("%d", &n);
    printf("Enter numbers:\n");
   
    for(m = 0; m < n; m++){
        printf("Enter %d #：",m+1);   
        scanf("%d", &a[m]);
        sum+=a[m];
    }
   
    average = sum / n;
    printf("average = %g\n", average);
   
    return 0;
}

#include <stdio.h>
#include <math.h>

int main(void) {
    int n, m, sum = 0;
    int a[n];
    double average;
   
    printf("Enter n: ");
    scanf("%d", &n);
    printf("Enter numbers:\n");
   
    for(m = 0; m < n; m++){
        printf("Enter %d #：",m+1);   
        scanf("%d", &a[m]);
        sum+=a[m];
    }
   
    average = 1.0*sum / n;
    printf("average = %g\n", average);
   
    return 0;
}

int a[n];想一想数组a在什么时候能分配到内存，也许就能找到问题所在。
for(m = 0; m <= n; m++)  这一句，数组要越界。

大神,谢谢,但是还是不行......

谢谢大神,但是还不行,不知道为什么

就是不懂.....刚学这个,有时候上课跟听天书一样.....

#include <stdio.h>
#include <math.h>

int main(void) {
    int n, m, sum = 0;
    int a[80];
    double average;
   
    printf("Enter n: ");
    scanf("%d", &n);
    printf("Enter numbers:\n");
   
    for(m = 0; m < n; m++){
        printf("Enter %d #：",m+1);   
        scanf("%d", &a[m]);
        sum+=a[m];
    }
   
    average = 1.0*sum / n;
    printf("average = %g\n", average);
   
    return 0;
}

我的错，没编译。。。我是学java的，，，，只是路过

C里面不可以定义动态数组
int a[n]   这里的n不可以是变量，只可以是常量

林师姐的代码提高了精确度
#include <stdio.h>
#include <math.h>

int main(void) {
    int n, m, sum = 0;
    int a[n];
    double average;
   
    printf("Enter n: ");
    scanf("%d", &n);
    printf("Enter numbers:\n");
   
    for(m = 0; m < n; m++){
        printf("Enter %d #：",m+1);   
        scanf("%d", &a[m]);
        sum+=a[m];
    }
   
    average = 1.0*sum / n;
    printf("average = %g\n", average);
   
    return 0;
}