Loop practice, C (gcc)

Language: Layout:

//int sum;
    //for i=0 to 1000 do
    //if (i%2=0) then
    //sum=sum+ij
    //    end if
    //    end for
    //    print sum
    //    end program
        
    // Program:
    // ask user for inputs
    // scan inputs
    // int sum
    // int x
    // scan inputs are allocated to x
    // for i=0 to undefined do
    // if (i<0) and (i>=-999) then
    // sum= sum+ij
    // print sum
    // end program

/*
program:
int sum
int n
scanf n
while n does not equal -999
if n<0 then
sum+=n
end if
scanf n
end while
print sum
end program
*/

/*
run program
int (max, x)
scan input x
while x=-1
    if (x<-1) and (x>max) then
        max+=x
    end while
print max

/*#include <stdio.h>
#define maxNum 5
int main()
{
 int i=0;
 for(;;)
 printf("Hellooo\n");
} */

/*
#include <stdio.h>
#define maxNum 10
int main()
{
 int i;
 for(i = 0; i<maxNum; ++i) {
 printf("i = %d\n", i);
 }
 printf("--------------------------------\n");
 printf("i after the for loop = %d\n", i);
 printf("--------------------------------\n");
 // for loop without the curly brackets {}
 for(i = 0; i<maxNum; ++i)
 printf("i = %d\n", i);
}
*/

#include <stdio.h>
int main(void)
{
 int n; 
 int counter=0;
 int sum=0;
 for(int i=1; i<=5; ++i)
 {
 scanf("%d", &n);
 if(( n >= 0 ) && ( n%2!=0)) {
 ++counter;
 sum += n;
 }
 else
 break;
 }
 printf("The sum of all numbers is: %d\n", sum);
 printf("The average of all numbers is: %f\n", (float) sum/ (float)counter);
}

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Compilation time: 0.15 sec, absolute running time: 0.32 sec, cpu time: 0.22 sec, memory peak: 3 Mb, absolute service time: 0,54 sec