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Author: saimachi

FastVectorAddition/arr_openmp.c

@@ -0,0 +1,32 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/time.h>
+
+#define ARRSIZE 1000000
+
+int main() {
+	int *A, *B, *C;
+	A = (int *)malloc(ARRSIZE*sizeof(int));
+	B = (int *)malloc(ARRSIZE*sizeof(int));
+	C = (int *)malloc(ARRSIZE*sizeof(int));
+
+	for (int i = 0; i < ARRSIZE; i++) {
+		A[i] = i;
+		B[i] = i;
+	}
+	
+	struct timeval start, end;
+	gettimeofday(&start, NULL);
+	#pragma omp parallel for default(none) shared(A,B,C)
+	for (int i = 0; i < ARRSIZE; i++) {
+		C[i] = A[i] + B[i];
+	}
+	gettimeofday(&end, NULL);
+
+	double time_taken = (end.tv_sec) + (end.tv_usec/1e6) - ((start.tv_sec) + (start.tv_usec/1e6));
+	printf("Time taken to add integer arrays of length %d: %g (seconds)\n", ARRSIZE, time_taken);
+
+	free(A);
+	free(B);
+	free(C);
+}