initial commit

file.txt

+username    password
+mohamed1    123yas
+yasar89     like123
+zero        notnot
\ No newline at end of file

fileformat.c

+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+struct array_char
+{
+    char user[10];
+    char password[10];
+} store[4];
+int user_check();
+int main()
+{
+    FILE *fp = fopen("file.txt","r");
+    char ch,inp[10],pass[10];
+    int i;
+    while (fp!=NULL)
+    {
+        ch = fgetc(fp);
+        if (ch!=EOF)
+        {
+            printf("%c",ch);
+        }
+        else 
+            break;
+    }
+    fseek(fp,SEEK_SET,0);
+    for (i = 0; i < 4; i++)
+    {
+        fscanf(fp,"%s %s",store[i].user,store[i].password);
+    }
+    user_check(store);
+    fclose(fp);
+}
+int user_check(struct array_char *store)
+{
+    int i,count=0;
+    char user[10],pass[10];
+    printf("\nEnter a username :");
+    scanf("%s",user);
+    for (i = 1; i < 4; i++)
+    {
+        if (!(strcmp(user,store[i].user)))
+        {
+            printf("\nUser has registered");
+            printf("\nEnter the password :");
+            scanf("%s",pass);
+            if (!(strcmp(pass,store[i].password)))
+            {
+                printf("\nLogin successfull");
+            }
+            else
+                printf("\nPassword doesn't match");
+            break;
+        }
+        else
+        {
+            count+=1;
+            if (count>3)
+            {
+                printf("\nUser did not register");
+            }
+        }
+    }
+}

filetemplate.c

+#include<stdio.h>
+#include<string.h>
+struct data
+{
+    int register_no;
+    char name[10];
+    char department[10];
+    float avg;
+}save[5];
+
+int main()
+{
+    int i;
+    FILE *fp = fopen("filetemplate.txt","r");
+    for (i = 0; i < 5; i++)
+    {
+        fscanf(fp,"%d %s %s %lf",save[i].register_no,save[i].name,save[i].department,save[i].avg);
+    }
+    for (i = 0; i < 5; i++)
+    {
+        printf("%s\n",save[i].name);
+    }
+    
+    return 0;
+}

filetemplate.txt

+Noofrecords 4
+1001    raj     CSE     76.5
+1002    raja    IT      80.2
+1003    kumar   CSE     90.2
+1004    siva    IT      65.8

split.c

+#include<stdio.h>
+#include<string.h>
+int main()
+{
+    int arr[30],i=0,j=0;
+    char opt[3]="yes";
+    while (!(strcmp("yes",opt)))
+    {
+        printf("Enter a element :");
+        scanf("%d",&arr[i]);
+        printf("Do you wish to continue :");
+        scanf("%s",opt);
+        i++;
+    }
+    printf("\n");
+    int size=i;
+    if (size%2==0 && size > 1)
+    {
+        int list1[15],list2[15];
+        for (i=0; i < size/2; i++)
+            list1[i]=arr[i];
+        for (j=0,i = i; i < size/2;i++)
+        {
+            list2[j]=arr[i];
+            j++;
+        }
+        for (i = 0; i < size/2; i++)
+            printf("%d ",list1[i]);
+        printf("\n");
+        for (i = size/2; i < size; i++)
+            printf("%d ",list2[i]);
+        printf("\n");
+    }
+    else if (size%2==1 && size > 1)
+    {
+        int list1[10],list2[10],list3[10];
+        if (size%3==0)
+        {
+            int div = size/3;
+            for (i = 0; i < size/3; i++)
+                list1[i]=arr[i];
+            for ( j = 0; j < size/3; j++,i++)
+                list2[j] = arr[i];
+            for (j = 0; j < size/3; j++,i++)
+                list3[j]=arr[i];
+            printf("\nlist 1 \n");
+            for (i = 0; i < div; i++)
+                printf("%d ",list1[i]);
+            printf("\nList 2\n");
+            for (i = 0; i < div; i++)
+                printf("%d ",list2[i]);
+            printf("\nList 3\n");
+            for (i = 0; i < div; i++)
+                printf("%d ",list3[i]);
+        }
+        else
+        {
+            for (i = 0; i < size/2; i++)
+                list1[i]=arr[i];
+            for (j = 0; j < size/2; j++)
+            {
+                list2[j]=arr[i];
+                i++;
+            }
+            for (j = 0; j < size-((size/2)*2); j++)
+            {
+                list3[j]=arr[i];
+                i++;
+            }
+            printf("\nlist 1 \n");
+            for (i = 0; i < size/2; i++)
+                printf("%d ",list1[i]);
+            printf("\nList 2\n");
+            for (i = 0; i < size/2; i++)
+                printf("%d ",list2[i]);
+            printf("\nList 3\n");
+            for (i = 0; i < size-((size/2)*2); i++)
+                printf("%d ",list3[i]);
+        }
+    }
+    else
+        printf("\nelement must greater than 1\n");
+}
\ No newline at end of file