array code has syntax errors, what are they?

I'm new to programming and am taking a C programming which is teaching me a lot on my own, but is still difficult. I do a lot of troubleshooting to figure out what the issues are but whenever it's syntax errors, I'm often at a loss because I can't detect what they are. Here's my code as of now:

Code:

int array[5];
int maxEl,minEl,i;

for
{
   (int a=1; a< 5; a++)
   scanf( "%d", &array[a] )
}

int main()
{
    
printf( "Please input 5 numbers: " );

}

for(i = 1;i < 5;i++)
{
if(array[i] > maxEl)
maxEl = array[i];
if(array[i] < minEl)
minEl = array[i];
}

printf("Diff: %d\n",diff( maxE1, minE1));


int diff(int maxEI, int minEI)
{
return maxEI - minEI;
}
{
system("pause");

}

I want to be able to find the difference between the smallest and largest element of an array of 5. What should I start doing differently? Thank you!

 

if you're compiling as C code, you need to declare any functions before they're called. You can this by using a prototype or put the function itself before main.

Code:

#include <stdio.h>

int foo(void); // function prototype
int bar(int a) { // function
   return a + a;
}

int main() {
   printf("foo = %d\nbar = %d",
            foo(), bar(5));
}

int foo(void) { // function definition
   return 10;
}

the for loop at the start of your program is an error. put it inside main or some other function.

in C, arrays are indexed starting at position 0 through size - 1.

Code:

#include <stdio.h>

// declare functions or function prototypes

int main() {

   // declare variables

   // ask for user input

   // loop through array to find min and max
   // find and/or print the diff
}

// define any function prototypes here

hope that helps

 

Ah, I see my error. I forgot to add the ";" to declare it as a function prototype.