c program to find average

by

I think this code is a little bit better. I’ve used the function malloc() instead of the “scattered” declaration int arr[n] (in this case I prefer the old C style).

People already said you the problem relevant to the variable types and some ways to solve the problem. Here there’s another way similar to the others you just saw between the answers.

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

#define STR_ORD_SUFFIX(i) (i>3)?"th":(i==0)?"--":(i==1)?"st":(i==2)?"nd":"rd"

int main()
{
    int n, *arr=NULL;
    float per1,per2,per3;

    int sum1=0;
    int sum2=0;
    int sum3=0;

    printf("How many number you have to insert? ");
    scanf("%d",&n);
    if (n<=0)
        return 1;

    arr=malloc(n*sizeof(*arr));
    if (arr==NULL)
        return 2;

    printf("Insert %d number%c\n",n,(n!=1)?'s':'\x0');
    for(int i = 0; i < n; i++){
        printf("%4d%s: ",i+1,STR_ORD_SUFFIX(i+1));
        scanf("%d",&arr[i]);
    }

    for(int i=0;i<=n-1;i++)
    {
        if(arr[i]<0){
            sum1=sum1+1;
        } else if(arr[i]>0){
            sum2=sum2+1;
        } else {
            sum3=sum3+1;
        }
    }

    per1=sum1; per1/=n; per1*=100.0;
    per2=sum2; per2/=n; per2*=100.0;
    per3=sum3; per3/=n; per3*=100.0;

    printf("\n<0 %.6f%%\n>0 %.6f%%\n=0 %.6f%%\n",per1,per2,per3);

    if (arr!=NULL)
        free(arr);

    return 0;

}

More Related Contents:

  1. what the output of this code and why?
  2. Passing values to macros by for loop
  3. How dangerous is it to access an array out of bounds?
  4. The need for parentheses in macros in C [duplicate]
  5. MIN and MAX in C
  6. Is a^a or a-a undefined behaviour if a is not initialized?
  7. How to make an OpenGL rendering context with transparent background?
  8. Rounding up to next power of 2
  9. Macro vs Function in C
  10. Why is the .bss segment required?
  11. Why does this code segfault on 64-bit architecture but work fine on 32-bit?
  12. Is there a typical state machine implementation pattern?
  13. Using poll function with buffered streams
  14. strcpy() return value
  15. Why array type object is not modifiable?
  16. Signal handling with multiple threads in Linux
  17. setvbuf not able to make stdin unbuffered
  18. Difference between section and task openmp
  19. Finding out what the GCC include path is [duplicate]
  20. Why does adding a small float to a large float just drop the small one?
  21. C Typedef and Struct Question
  22. Correctness of Sakamoto’s algorithm to find the day of week
  23. Argument-parsing helpers for C/Unix
  24. C: how to break apart a multi digit number into separate variables?
  25. Status of __STDC_IEC_559__ with modern C compilers
  26. Scanf/Printf double variable C
  27. When an int is cast to a short and truncated, how is the new value determined?
  28. Executing code before main()
  29. Dynamic array allocation on stack in C
  30. How to implement Bitcount using only Bitwise operators?

Leave a Comment