added more programs

2darray.c

@@ -0,0 +1,96 @@
+#include<stdio.h>
+#include<string.h>
+char name[10][20] ={"Ananya","Bikramjit","Chityoraj","Dharmesh","Elen","Fatama","Ganasan","Harischandra","Intrajit","Jagdip"};
+char roll[10][6] ={"CS101","CS102","CS103","CS104","CS105","CS106","CS107","CS108","CS109","CS110"};
+int Marks[10][3] = {
+{ 65,75,90},
+{ 70,55,73},
+{ 55,54,85},
+{ 63,65,92},
+{ 60,30,65},
+{ 72,84,50},
+{ 86,76,30},
+{ 73,89,67},
+{ 91,73,75},
+{ 45,35,83},
+};
+char sub[3][10]={"English","Math","Science"};
+int pos(char arr[])//function to get position of the Subject
+{
+    int i;
+    for(i=0;i<3;i++)
+    {
+        if(strcmp(arr,sub[i])==0)//using string function
+        return i;
+    }
+}
+void details(char rollno[])//function to print details using rollnumber
+{
+int i;
+for(i=0;i<10;i++)
+{
+if(strcmp(rollno,roll[i])==0)
+    {
+               printf("Marks in english is %d , Marks in math is %d , Marks in Science is %d \n",Marks[i][0],Marks[i][1],Marks[i][2]);
+       break;
+    }
+}
+return;
+}
+void less40(char subj[])//function to find details of students securing less than 40 
+{
+    int i,flag=0;
+    int n=pos(subj);
+    for(i=0;i<10;i++)
+    {
+        if(Marks[i][n]<40)
+        {
+            flag=1;
+            printf("Name and Roll no of student with total less than 40 in %s are %s and %s\n",sub[n],name[i],roll[i]);
+        }
+    }
+    if(flag==0)
+    {
+        printf("None have total less than 40 in %s\n",sub[n]);
+    }
+    return;
+}
+void avgg(char subject[])//function to compute average of a given subject
+{
+    float avg;
+    int sum=0,i,count=0;
+    int k=pos(subject);
+    for(i=0;i<10;i++)
+    {
+        sum=sum+Marks[i][k];
+    }
+    avg=(float)sum/10;
+    printf("The average of %s is %.2f\n",sub[k],avg);
+    for(i=0;i<10;i++)
+    {
+    if(Marks[i][k]<avg)
+    {
+        count++;
+    }
+    }
+    printf("No of students securing less than average in %s subject is %d",sub[k],count);
+    return;
+}
+int main()
+{
+    char rollno[10];
+    char subj[10];
+    char subject[10];
+    printf("Enter roll number of Students to get Marks\n");
+    scanf("%s",rollno);
+              details(rollno);
+              printf("\n");
+        printf("Enter Subject names to get details of students who got less than 40\n");
+    scanf("%s",subj);
+    less40(subj);
+    printf("\n");
+        printf("Enter Subject names to get average and no of students securing less than avg\n");
+    scanf("%s",subject);
+    avgg(subject);
+    return 0;
+}

AIRFARE.c

@@ -0,0 +1,67 @@
+// Write a program that reads different city-names that the traveler is moving; starting from the source to
+// distinction and compute the total cost of his travel.
+// Example
+// How many cities the traveler will move: 5
+// Enter the cities: City1 – Kolkata
+// City2 – Kanpur
+// City3 – Goa
+// City4 – Pune
+// City5 – Delhi
+// The total cost of travel is 9720
+#include<stdio.h>
+#include<string.h>
+//int strcmp(const char* x, const char* y);
+int findcityindex(char* c, char list[6][10]);
+void citycopy(char *x, char *y);
+int main(){
+	int costtable[6][6] = {
+							{0,3525,2850,3000,2900,1500},
+							{3525,0,3700,4000,3800,2500},
+							{2850,3700,0,1800,870,2200},
+							{3000,4000,1800,0,1025,2700},
+							{2900,3800,870,1025,0,3500},
+							{1500,2500,2200,2700,3500,0}
+						};
+
+
+	char citynames[6][10]={ "Delhi","Kolkata","Pune","Mumbai","Goa","Kanpur"};
+	char current_city[10], next_city[10];
+    int x,i,total=0;
+	printf("Enter the number of city travelled \n");
+    scanf("%d",&x);
+    printf("Enter city 1 \n");
+    scanf("%s",&current_city);
+    for(i=0;i<x-1;i++)
+    {
+        printf("Enter city %d \n",(i+2));
+        scanf("%s",&next_city);
+        int x=findcityindex(current_city,citynames);
+        int y=findcityindex(next_city,citynames);
+        total=total+costtable[x][y];
+       citycopy(next_city,current_city);
+    }
+	printf("Total is: %d",total);
+
+           return 0;
+
+}
+
+
+void citycopy(char *des, char *sou)//copying destination to source
+{
+		strcpy(sou,des);
+}
+/*int strcmp(const char* x, const char* y){
+	this block is not required for execution
+}
+*/
+int findcityindex(char* c, char list[6][10]){
+	int i;
+
+
+	for(i=0;i<6;i++)
+    {
+		if(strcmp(c,list[i])==0) return i;
+	}
+	return -1;
+}

Array_of_structures_using_fflush_keyword.c

@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <string.h>
+struct employee
+{
+    char a;
+} x[3];
+int main()
+{
+    int i;
+    printf("Enter 3 characters \n");
+    for (i = 0; i <3; i++)
+    {
+        scanf("%c", &x[i].a);
+       fflush(stdin);
+    }
+    printf("3 chars are \n");
+    for (i = 0; i < 3; i++)
+    {
+        printf("%c", x[i].a);
+    }
+
+    return 0;
+}

arrayunique.c

@@ -0,0 +1,65 @@
+#include <stdio.h>
+    int count=0;
+#define MAX_SIZE 100  // Maximum array size
+    int a[MAX_SIZE];
+void duplicate(int arr[],int size)
+{
+    int i,j;
+     for(i=0; i<size; i++)               // 10 20 10 20 21
+    {
+        for(j=i+1; j<size; j++)
+        {
+            /* If duplicate found then increment count by */
+            if(arr[i] == arr[j]&&arr[i]!=0)
+            {
+                a[count]=arr[i];
+                count++;
+                arr[i]=0;
+                arr[j]=0;
+                break;
+            }
+
+        }
+    }
+    printf("\nTotal number of duplicate elements found in array = %d \n", count);
+    printf("duplicate elements are: ");
+    for(int i=0;i<count;i++)
+    {
+       printf("%d, ",a[i]);
+    }
+    printf("\n");
+    return;
+}
+void unique(int arr[],int size)
+{
+    printf("Total no of unique elements are %d\n",(size-(2*count)));
+    printf("The unique elements are: ");
+    for(int i=0;i<size;i++)    //10 21 10 20 20     20 10     
+    {
+        if(arr[i]!=0)
+        {
+            printf("%d, ",arr[i]);
+        }
+    }
+}
+
+int main()
+{
+    int arr[MAX_SIZE];
+    int i, j, size;
+
+    /* Input size of array */
+    printf("Enter size of the array : ");
+    scanf("%d", &size);
+
+    /* Input elements in array */
+    printf("Enter elements in array : ");
+    for(i=0; i<size; i++)
+    {
+        scanf("%d", &arr[i]);
+    }
+    duplicate(arr,size);
+    unique(arr,size);
+
+    return 0;
+}

assgn_36.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+int main()
+{
+    int x,i,t;
+    printf("Enter length of array\n");                       
+    scanf("%d",&x);                                                
+        int arr[x];
+    printf("Enter elements of array\n");                       
+    for(i=0;i<x;i++) 
+    {
+        printf("Enter %d th element :",i);                       
+        scanf("%d",&arr[i]);
+    }
+    printf("array elements are \n");                       
+    for(i=0;i<x;i++)
+    {
+        printf("%d",arr[i]);                       
+    }
+    for(i=0;i<(x/2);i++)
+    {
+        t=arr[i];
+        arr[i]=arr[x-i-1];
+        arr[x-i-1]=t;
+    }
+    printf("array elements in reverse fashion \n");
+    for(i=0;i<x;i++)
+    {
+        printf("%d",arr[i]);                       
+    }
+    return 0;
+}
+////////////////////////////////////////////////////

bitwise.c

@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <stdlib.h>
+//Complete the following function.
+
+
+void calculate_the_maximum(int n, int k)
+{
+    int i,j,add=0,orr=0,xorr=0;
+    for(i=1;i<n;i++)
+    {
+        for(j=i+1;j<=n;j++)
+        {
+            if((i&j)<k&&add<(i&j))
+            {
+                add=i&j;
+            }
+        }
+    }
+        for(i=1;i<n;i++)
+    {
+        for(j=i+1;j<=n;j++)
+        {
+            if((i|j)<k&&orr<(i|j))
+            {
+                orr=i|j;
+            }
+        }
+    }
+        for(i=1;i<n;i++)
+    {
+        for(j=i+1;j<=n;j++)
+        {
+            if((i^j)<k&&xorr<(i^j))
+            {
+                xorr=i^j;
+            }
+        }
+    }
+    printf("%d\n",add);
+    printf("%d\n",orr);
+    printf("%d\n",xorr);
+
+}
+
+int main() 
+{
+    int n, k;
+
+    scanf("%d %d", &n, &k);
+    calculate_the_maximum(n, k);
+    return 0;
+}

freeefficiently.c

@@ -0,0 +1,17 @@
+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+int main(){
+int *ptr;
+int i;
+ptr=(int*)malloc(1*sizeof(int));
+printf("Enter the value of integers \n");
+for(i=0;i<5;i++)
+{
+    scanf("%d",&ptr[0]);
+    fflush(stdin);
+    printf("The value at %d is %d \n",i,ptr[0]);
+    free(ptr);
+}
+return 0;
+}

freeptr.c

@@ -0,0 +1,17 @@
+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+int main(){
+int* ptr,i;
+ptr=(int*)malloc(3*sizeof(int));//malloc
+// for(i=0;i<10;i++)
+// {
+//     printf("Enter value of array at %d number \n",i);
+//     scanf("%d",&ptr[0]);
+//     fflush(stdin);
+//     printf("%d",ptr[0]);
+//     free(ptr);
+// }
+
+// return 0;
+// }