This code is to find the mean, median and mode for a given sequence of number.

```
#include <stdio.h>
#include <math.h>
int main()
{ /*Inputs*/
int n;
int a[n];
/*Outputs*/
float mean;
int median;
int mode;
printf("Enter the size of array: ");
scanf("%d",&n);
for(int i=0; i<n; i++)
{
printf("\nEnter the values of array: ");
scanf("%d",&a[i]);
}
/*arrange in ascending order */
int i=0;
for(i=0; i<n-1; i++)
{for(i=0; i<n-1; i++)
{
if(a[i]>a[i+1])
{
int temp = a[i+1];
a[i+1] = a[i];
a[i] = temp;
}
}
}
/*Mean of the series*/
for(i=0; i<n; i++)
{
int sum = 0;
sum = sum + a[i];
mean = sum/n;
}
/*Median of the series*/
```

I hope the syntax of typecasting here is right, right?

```
int m = floor((double)n/2);
if(n%2==0)
{
median = (a[m]+a[m-1])/2;
}
else
{
median = a[m];
}
/*Mode of the series*/
int count;
int b = 0;
for(i=0; i<n-1; i++)
{
for(int t=0; t<n; t++) //Compare a[i] with all the elements of the array
{if(a[i]==a[t])
{
count = 0;
count++;
}
if(b<count) //Update the new value of mode iff the frequency of one element is greater than that
{ // of its preceding element.
mode = a[i];
}
}
}
printf("The value of mean: %f",mean);
printf("\nThe value of mean: %d",median);
printf("\nThe value of mean: %d",mode);
return 0;
}
```

There were no errors in the code.

I received the following message on the prompt after "CentralT...... working": Process returned -1073741571 (0xC00000FD) execution time : 47.686 s Press any key to continue.

asked on Stack Overflow May 20, 2018 by Md Arshad Ali

In C you cannot resize an array.

This line

```
int n;
```

defines `n`

and leaves its value as garbage, a random value, perhaps `0`

.

Based on what ever `n`

holds this line

```
int a[n];
```

defines `a`

as array to have the number of element as per `n`

*now* has.

Reading into `n`

in this line

```
scanf("%d",&n);
```

does *not* change the number over `a`

's elements.

To fix this, define `a`

only after `n`

has a well defined, valid value:

```
scanf("%d",&n);
int a[n];
```

To really make sure `n`

had been set you want to test the outcome of `scanf()`

like for example:

```
do {
if (1 != scanf("%d, &n))
{
puts("Bad input or failure reading n!\n");
continue;
}
} while (0);
```

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