logo
Course thumb

The C programming language made simple

What is a static variable?

#include <stdio.h> #include <stdlib.h> #include <string.h> int add(int x) { static int sum = 0; sum += x; return sum; } int main(int argc, char* argv[]) { printf("%d\n", add(5)); printf("%d\n", add(5)); printf("%d\n", add(5)); printf("%d\n", add(5)); // Doesn't work, sum is not defined in this scope //printf("%d\n", sum); return 0; }