Hi,I'm a beginner with C.

And a Bit confused with the Following Snippet,can you guys help?

Code Snippet

The Following Function Excepts 25 Numbers from the Keyboard & Prints the sum of the +ve Number's

#include <stdio.h>

main()

{int i,sum,num;

for(i=0;i<25;i=i+1)

{

puts("Enter a Number");

scanf("%d,& num");

fflush(stdin);

if(num <=0) /* non positive numbers*/

continue;

sum=sum+num

}

printf("The sum of positive numbers entered is %d\n",sum);

}

Questions

1.can you Explain "sum=sum+num"

2.Can you give me a clear idea of things? and explain to me the function in detail,please!

Thanks for the Help,