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Waiting for processes to finish (using the wait function) in C

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <sys/wait.h> int main(int argc, char* argv[]) { int id = fork(); int n; if (id == 0) { n = 1; } else { n = 6; } if (id != 0) { wait(NULL); } int i; for (i = n; i < n + 5; i++) { printf("%d ", i); fflush(stdout); } if (id != 0) { printf("\n"); } return 0; }