Assignment4 Sheqi

2duplicate.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+
+int main(){
+	int n,x;
+	int i=0;
+	int j=1;
+	int iarray[n];
+	printf("Please type in an array:\n");
+	scanf("%d",&iarray[n]);
+	for(i=0;i<n;i++){
+		for(j=i+1;j<=n;j++){
+			if(iarray[i]>iarray[j]){
+				x=iarray[j];
+				iarray[j]=iarray[i];
+				iarray[i]=x;
+			}
+			continue;
+		}}
+	for(i<0;i<n;i++){
+		if(i>0&&iarray[i-1]==iarray[i]){
+			break;}
+		printf("%d ",iarray[i]);
+	}
+	return 0;
+}
+
+
+
+

Assignment 4

@@ -0,0 +1,26 @@
+Assignment 4 Sheqi Zhang
+
+1. Discuss the differences between strings and a character array.
+Answer:
+A string is an array of chars, and an array is a group of characters within the same type. An array is static, and we can't change its size after declarition, while we can change the strings after declaeition. There is always a "\0" at the end of a string, while an array doesn't have that. 
+
+2. Explain the advantages and disadvantages of arrays in C.
+Answer:
+Advantage: We can use it to store and use a group of similar data.
+Disadvantage: We can't change the property like the size of the array, which will make our programming not convenient.
+
+3. When does the compiler not implicitly generate the address of the first element of an array?
+Answer:
+There are three situations:
+1. The array is a string literal initializer for a character array;
+2. The array is a operend of sizeof operator;
+3. The array is a operand of "&" operator.
+
+4. How would two strings be compared to see if they’re equivalent in content?
+Answer:
+Using the string function: strcmp(string1,string 2);
+It is comparing string 2 to string 1.
+If it returns 0, the two string are equivalent.
+
+
+

HangmanGame.c

@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+
+int main(){
+	srand(time(0));
+	char r =rand();
+	int length = rand();
+	length<15;
+	printf("This word has \"%d\" characters", length);
+	char word[length];
+	char guess[length];
+	int x = 0;
+	char letter;
+	while(x<4){
+	scanf("%c",&letter);
+	if(letter==word[x]){
+		guess[x]==letter;
+		printf("Please guess the next letter!\n");
+	}
+	else
+	{
+		printf("Try again!\n");
+	}
+	++x;
+	continue;
+	}
+	return 0;
+	}
+
+
+
+

array.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <string.h>
+
+int main(){
+	int n;
+	int i=0;
+	int sum=0;
+	int inumbers[n];
+	int inew[n];
+
+	printf("Please enter a group of number:");
+	scanf("%u ",&inumbers[n]);
+
+	while(i<n){
+		sum += (int) inumbers[i];
+	//	printf("sum=%d",sum);
+		i++;
+	//	printf("i=%d",i);
+		continue;
+	}
+	//printf("sum=%d",sum);
+
+	inew[i]= sum - inumbers[i];
+	printf("%u",inew[n]);
+
+	return 0;
+}
+
+

frequency.c

@@ -0,0 +1,28 @@
+#include <stdio.h>
+
+int main(){
+	int n;
+	int i=0;
+	int j=0;
+	char ia[n];
+	char jletter[52];
+	int jtimes[52]={0};
+	n<=100;
+	printf("Please type in an array with only letters:\n");
+	scanf("%c",&ia[n]);
+	for(i=0;i<52;i++){
+		for(j=0;j<52;j++){
+		if(ia[i]==jletter[j])
+		++jtimes[j];
+		continue;
+	}
+	printf("\"%c\":\"%d\"\n",jletter[j],jtimes[j]);
+	continue;
+	}
+	return 0;
+}
+
+
+
+
+