Some changes

Fork_and_Wait/forking_wait.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include "matrix.h"
+
+#define DIMENSION 1000
+
+int main(void){
+
+    pid_t piet= fork();
+    if(piet == (pid_t)0){
+        // child
+        printf("Child starts...\n");
+        long long *matrixA = (long long*)malloc(DIMENSION * DIMENSION * sizeof(long long));
+        long long *matrixB = (long long*)malloc(DIMENSION * DIMENSION * sizeof(long long));
+        long long *matrixC = (long long*)malloc(DIMENSION * DIMENSION * sizeof(long long));
+        srand (time( NULL));
+        initializeMatrix(matrixA, DIMENSION, DIMENSION);
+	initializeMatrix(matrixB, DIMENSION, DIMENSION);
+        multiplyMatrices(matrixA, matrixB, matrixC, DIMENSION, DIMENSION, DIMENSION);
+	free(matrixA);
+	free(matrixB);
+	free(matrixC);
+	printf("Child finish...\n");
+        
+    }else{
+        // parent
+	int status = -1;
+	int seconds = 0;
+	while(status == -1){
+		waitpid(piet, &status, WNOHANG);
+		printf("Parent waits since: %d\n", seconds++);
+            	sleep(1);	
+	}
+    }
+
+    return 0;
+}