update C snipplets

code/C/System/get_ram_usage.c

@@ -0,0 +1,11 @@
+#include <sys/resource.h>
+#include <stdio.h>
+
+int main() {
+  struct rusage r_usage;
+  getrusage(RUSAGE_SELF, &r_usage);
+
+  printf("Memory usage: %ld kilobytes\n", r_usage.ru_maxrss);
+
+  return 0;
+}