Raghav Solutions

03/06/2021

06/07/2020

वेबसाइट का कार्य खरगोन मे सबसे न्यूनतम दरों पर आपके व्यापार, संस्था या व्यक्तिगत पोर्टफोलियो के लिए संपर्क करे ।

28/04/2020

अगली ऑनलाइन क्लास CPP या Java?
आप बतायें 👍

27/04/2020

// Read Data from a existing File

# include
# include

int main( )
{

// Declare the file pointer
FILE *fp ;

// Declare the variable for the data to be read from file
char data[50];

// Open the existing file using fopen()
// in read mode using "r" attribute
fp = fopen("demotest.txt", "r") ;

// Check if this fp is null
// which maybe if the file does not exist
if ( fp == NULL )
{
printf( "demotest.txt file failed to open." ) ;
}
else
{

printf("The file is now opened.\n") ;

// Read the data from the file
// using fgets() method
while( fgets ( data, 50, fp ) != NULL )
{

// Print the data
printf( "%s" , data ) ;
}

// Closing the file using fclose()
fclose(fp) ;

printf("Data successfully read from file demotest.txt\n");
printf("The file is now closed.") ;
}
return 0;
}

27/04/2020

////Program for Writing Data into file
# include
# include
int main( )
{

// Declare the file pointer
FILE *fp ;

// Get the data to be written in file
char data[50] = "HELLO Students Testing Data";

// Open the existing file demotest.txt using fopen()
// in write mode using "w" attribute
fp = fopen("demotest.txt", "w") ;

// Check if this fp is null
// which maybe if the file does not exist
if ( fp == NULL )
{
printf( "demo test file failed to open." ) ;
}
else
{

printf("The file is now opened.\n") ;

// Write the data into the file
if ( strlen ( data ) > 0 )
{

// writing in the file using fputs()
fputs(data, fp) ;
fputs("\n", fp) ;
}

// Closing the file using fclose()
fclose(fp) ;

printf("Data successfully written in file\n");
printf("The file is now closed.") ;
}
return 0;
}

27/04/2020

File Handling

25/04/2020

//Demostration of Structure and Union Size Comparision


union unionDemo
{
//defining a union
//char name[10];
float salary;
int id;
} u_instance;

struct structDemo
{
//char name[10];
float salary;
int id;
} s_instance;

int main()
{
printf("size of union = %d bytes", sizeof(u_instance));
printf("\nsize of structure = %d bytes", sizeof(s_instance));
return 0;
}

25/04/2020

Saturday Class Content

24/04/2020

//Structure Demostration


/*structure creation*/
struct student
{
char name[50]; // structure member1
int id; // structure member2
char branch[20]; // structure member3
int age; // structure member4
char place[50]; // structure member5
} std; // structure variable
int main()
{
/*Taking information from keyboard and store it by using structure variable std*/
printf("Enter Student Information\n");
printf("----------------------------\n");
printf("enter name :");
scanf("%s",std.name);

printf("enter id :");
scanf("%d",&std.id);

printf("enter branch name :");
scanf("%s",std.branch);

printf("enter age :");
scanf("%d",&std.age);

printf("enter location :");
scanf("%s",std.place);

/*Displaying student information */
//Accessing information by using structure variable std
printf("Displaying Student Information\n");
printf("----------------------------\n");

printf(" name: %s\n", std.name);
printf(" id: %d \n", std.id);
printf(" branch: %s \n", std.branch);
printf(" age: %d\n", std.age);
printf(" place: %s \n", std.place);

return 0;
}

24/04/2020

//Realloc Example



int main()
{
int *ptr, i , n1, n2;
printf("Enter size: ");
scanf("%d", &n1);

ptr = (int*) malloc(n1 * sizeof(int));

printf("Addresses of previously allocated memory: ");
for(i = 0; i < n1; ++i)
printf("%u\n",ptr + i);
printf("\nEnter the new size: ");
scanf("%d", &n2);
// rellocating the memory
ptr = realloc(ptr, n2 * sizeof(int));
printf("Addresses of newly allocated memory: ");
for(i = 0; i < n2; ++i)
printf("%u\n", ptr + i);

free(ptr);

return 0;
}

24/04/2020

//Calloc Example



int main()
{
int n, i, *ptr, sum = 0;
printf("Enter number of elements: ");
scanf("%d", &n);
ptr = (int*) calloc(n, sizeof(int));
if(ptr == NULL)
{
printf("Error! memory not allocated.");
exit(0);
}
printf("Enter elements: ");
for(i = 0; i < n; ++i)
{
scanf("%d", ptr + i);
sum += *(ptr + i);
}
printf("Sum = %d", sum);
free(ptr);
return 0;

}

24/04/2020

Dynamic Memory Allocation Functions(Continued...)