C

I/O

• Use scanf() to get input.
• Use printf() to write output.

Program Structure

• Make sure you have a main function with the int return type.
• Make sure your main function returns the integer 0 on success, otherwise your program will fail with a Runtime Error. You should never return anything other than 0 in main.

Compiling

We recommend that you install and use GCC.

Example

Adding two numbers. Numbers will be space separated on a single line.

#include "stdio.h"

int main (void) {
    int a, b;
    scanf("%d %d", &a, &b);
    printf("%d", a + b);
    return 0;
}

Submit

• Go to the submit tab and upload the addition program above by copy-pasting and selecting C in the language dropdown.
• Understanding submission feedback.

Sample Explanation

3 + 4 = 7