Variable Declaration

[ashlee]

I am confused with the declaration of variable passed as argument to a function.I tried a sample C program given below:
#include <stdio.h>
main()
{
int a=500,c;
c=sampel(a);
printf("c=%d",c);
}
sample(t)
{
int t;
t=t+10;
return(t);
}

The above program gave me error. Is it that I have to declare t before the opening braces of defining the function sample? What is the reason for this?

[Mukhtar Ahmad]

int sample(int t)
{
int t;
t=t+10;
return(t);
}


look at the "int sample(int t)" as compared to sample(t)

[sammy]

The error you would have got is Re-declaration of t in function sample. Am I right? The reason for this is you have not declared the variable t before the opening brace of function sample().So by default it is assumed as integer variable. But again after the opening brace you have declared again variable t which causes the compiler to throw the error message as re-declaration of
variable t. Remove the declaration and try out and always it is best to declare variables before the opening braces of function calling.