assignment 8

assignment8.txt

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+Christopher Liu
+1. The output is ABCabc123. I get how the first part will make the arg capital, but the part after q = p + strlen(a) I don’t get. 
+2. I don’t know what valgrind is, but probably 7?
+3. line 20-23 is redundant and reassigns the array I think. Not sure.
+line 28
+
+4. 
+line 14 char *c
+line 28 [free(p)]

averagestd.c

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+/* Christopher Liu */
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int main()
+{
+	FILE * file_var = fopen("averagestd.txt", "r");
+	float distance_sum = 0, total = 0;
+	int conv = 1, count = 0;
+	while (!feof(file_var))
+	{
+		conv = fscanf(file_var, "%*f");
+		count++;
+	} 	
+	fseek (file_var, 0, SEEK_SET);
+	float num_list[count];
+
+	for (int i = 0; i < count; i++)
+	{
+		fscanf(file_var, "%f", &num_list[i]);
+		total += num_list[i];
+	}
+	float avg = total/count;
+	for (int i = 0; i < count; i++)
+	{
+		distance_sum += (float) fabs((avg - num_list[i])*(avg - num_list[i]));
+	}
+	float std = sqrt(distance_sum/count);
+	printf("AVG: %f, TOTAL: %f, COUNT: %d, STD: %f", avg, total, count, std);
+
+	fclose(file_var);
+}
+

averagestd.txt

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+90
+80
+99.4
+102.7
+39210.3
+30.0
+60.4
+70.8
+99.54
+102.3
+98.0
+97.6
+43.5
+60.79
+70.92
+84.3

sort.c

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+/* Christopher Liu */
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+
+void printlist(int * list, int size)
+{
+	printf("LIST: ");
+	for (int i = 0; i < size; i++)
+	{
+		printf("%d ", list[i]);
+	}
+	printf("\n");
+}
+
+int main()
+{
+	srand(time(NULL));
+
+	int size;
+	printf("NUMBER: ");
+	scanf("%d", &size);
+	int* num_list = (int*) malloc(size*sizeof(int));
+	for (int i = 0; i <  size; i++)
+	{
+		num_list[i] = rand()%40;
+	}
+	int* as_sort = (int*) malloc((size+1)*sizeof(int));
+	int* de_sort = (int*) malloc((size+1)*sizeof(int));
+	for (int i = 0; i < size; i++)
+	{
+		as_sort[i] = num_list[i];
+		de_sort[i] = num_list[i];
+	}
+
+	for (int i = 1; i < size; i++)
+	{
+		int key =  as_sort[i];
+		int j = i-1;
+		while (key < as_sort[j])
+		{
+			as_sort[i] = as_sort[j];
+			i--;
+			j--;
+		}
+		as_sort[i] = key;
+	}
+		for (int i = 1; i < size; i++)
+	{
+		int key =  de_sort[i];
+		int j = i-1;
+		while (key > de_sort[j] && i > 0)
+		{
+			de_sort[i] = de_sort[j];
+			i--;
+			j--;
+		}
+		de_sort[i] = key;
+	}
+	printf("NUMLIST: ");
+	printlist(num_list, size);
+	printf("AS_SORT: ");
+	printlist(as_sort, size);
+	printf("DE_SORT: ");
+	printlist(de_sort, size);
+	free(num_list);
+	free(de_sort);
+	free(as_sort);
+
+	return 0;
+}