Time in Omp operation

vec_add.cpp

@@ -22,12 +22,19 @@ void add(int *a, int *b, int *c, int n) {
     c[i] = a[i] + b[i];
 }
 
+void addOmp(int *a, int *b, int *c, int n) {
+ #pragma omp parallel for
+  for (int i = 0; i < n; i++)
+    c[i] = a[i] + b[i];
+}
+
 int main(int argc, char const *argv[]) {
   if (argc < 2) 
     cout << "I need more inputs" << endl;
   else {
     int vec_size = stoi(argv[1]);
     int *a, *b, *c;
+    double begin, end;
 
     a = (int *)malloc(vec_size * sizeof(int));
     b = (int *)malloc(vec_size * sizeof(int));
@@ -39,10 +46,15 @@ int main(int argc, char const *argv[]) {
     //print("a = ", a, vec_size);
     //print("b = ", b, vec_size);
 
-    double begin = omp_get_wtime();
+    begin = omp_get_wtime();
     add(a, b, c, vec_size);
-    double end = omp_get_wtime();
-    cout << end - begin << endl;
+    end = omp_get_wtime();
+    cout << "Sequential -> " << end - begin << endl;
+
+    begin = omp_get_wtime();
+    addOmp(a, b, c, vec_size);
+    end = omp_get_wtime();
+    cout << "OpenMP -> " << end - begin << endl;
 
     //print("c = ", c, vec_size);