1
float sum(float data[], int N)
2
{
3
    float sum=0.0;
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    for (int i=0;i<N;i++)
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        sum += data[i];
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    return sum;
7
}

1
#include <math.h>
2
double Avg(int N, int data[])
3
{
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    double avg=0.0;
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    for (int i=0;i<N;i++)
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        avg += data[i];
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    return avg/N;
8
}
9
double StdDev(int N, int data[])
10
{
11
    double dev=0.0,avg=0.0;
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    for (int i=0;i<N;i++)
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        avg += data[i];
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    avg /= N;
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    for (int i=0;i<N;i++)
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        dev += pow(data[i]-avg,2);
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    return pow(dev/N,0.5);
18
}

1
#include <ctype.h>
2
void cryptograp(char ch[], int n)
3
{
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    for (int i=0;i<n;i++)
5
    {
6
        if (islower(ch[i]))
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            ch[i] = (ch[i]-'a'+5)%26+'a';
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        else if (isupper(ch[i]))
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            ch[i] = (ch[i]-'A'+5)%26+'A';
10
    }
11
}

1
void ShowDate(int y, int m)
2
{
3
  int daysInMonth = GetDaysofMonth(y, m);
4
  int firstDay = GetFirstDayInTable(y, m);
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  printf("***********************************\n");
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  printf("Sun Mon Tue Wen Thur Fri Sta\n");
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  for (int i = 0; i < firstDay; i++)
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    printf("    ");
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  for (int day = 1; day <= daysInMonth; day++)
10
  {
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    printf("%2d ", day);
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    if ((day + firstDay) % 7 == 0)
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      printf("\n");
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  }
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  printf("\n***********************************\n");
16
}