C/Data Type/Int

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Adds up 5 numbers

#include <stdio.h>

int main() {
    int total = 0;
    int current;
    int counter = 0;
    char line[80];
    while (counter < 5) {
        printf("Number? ");
        fgets(line, sizeof(line), stdin);
        sscanf(line, "%d", &current);
        total += current;
        ++counter;
    }
    printf("The grand total is %d\n", total);
    return (0);
}


Assign int value to three int variable

#include <stdio.h>
int main(void)
{
  int i, j, k;
  i = j = k = 99;
  printf("%d %d %d", i, j, k);
  return 0;
}


Assign value to short int

  
#include <stdio.h>
int main(void)
{
  short int i;
  i = -10;
  
  printf("%d", i);
  return 0;
}


Averaging ten numbers - storing the numbers the hard way

#include <stdio.h>
void main()
{
  int number0 = 10, number1 = 40, number2 = 50, number3 = 80, number4 = 80;
  int number5 = 20, number6 = 30, number7 = 60, number8 = 70, number9 = 110;
  long sum = 0L;                                 /* Sum of the numbers          */
  float average = 0.0f;                          /* Average of the numbers      */
  sum = number0 + number1+ number2 + number3 + number4+
           number5 + number6 + number7 + number8 + number9;
   average = (float)sum/10.0f;
   printf("Average of the ten numbers entered is: %f", average);
}


Convert float to int

  
#include <stdio.h>
int main(void)
{
  int i;
  float f;
  f = 34.0098;
  
  i = f; /* convert float to int */
  
  printf("%f %d", f, i);
  return 0;
}


Define and use int

#include <stdio.h>
int main(void)
{
  int i;
  i = 10;
  i = -i;
  printf("  i = %d", i);
  return 0;
}


Define int and initialize it

  
#include <stdio.h>
int main(void)
{
  int i = -1;
  printf(" i is initialized to %d", i);
  return 0;
}


Define int variable and output

/* Variables */
#include <stdio.h>
void main()
{
  int a;       /* Declare an int variable called a */
  int b;       /* and another int variable called b*/
  
  a = 7;       /* Store 7 in the variable a   */
  b = 7;       /* Store 7 in the variable b*/
  /* Display some output */
  printf("a is %d  and b is %d ", a, b);
}


Display a table of squares and cubes

#include <stdio.h>
int main(void)
{
  int i;
  for(i = 1; i < 20; i++)
    printf("%8d %8d %8d\n", i, i * i, i * i * i);
  return 0;
}


Divide the first number by the second

#include <stdio.h>
int main(void)
{
  int a, b;
  printf("Enter two numbers: ");
  scanf("%d%d", &a, &b);
  if(b) 
      printf("%d\n", a/b);
  else 
      printf("Cannot divide by zero.\n");
  return 0;
}


Do calculation on int

#include <stdio.h>
int main(void)
{
  int i;
  for(i = 1; i < 11; i++)
    printf("%d %d %d\n", i, i * i, i * i * i);
  return 0;
}


For and sum:Sum the integers from 1 to a user-specified number

#include <stdio.h>
void main() {
   long sum = 0L; 
   int count = 10; /* The number of integers to be summed */
   int i = 0;     /* The loop counter                    */

   /* Sum integers from 1 to count */
   for(i = 1 ; i <= count ; i++)
     sum += i;
   printf("\nTotal of the first %d numbers is %ld\n", count, sum);
}


How to define variable and use them

#include <stdio.h>
main() {
    
    int i,j,k; // Defining variables
    
    i = 6;
    j = 8;
    k = i + j;
    
    printf("sum of two numbers is %d \n",k);
}


Int variable: value assign and calculation

  
#include <stdio.h>
int main(void)
{
  int a, b;
  a = 1;
  a = a + 1;
  b = a;
  b = b - 1;
  printf("%d %d", a, b);
  return 0;
}


maximum and minimum value of int

#include <stdio.h>
main() {
    int i,j ; 
 
    i = 1;
    
    while (i > 0) {
        j = i;
        i++;
    }
    
    printf ("Maximum value of integer is %d\n",j);
    printf ("The value of  integer after overflow is %d\n",i);
}


Output the short and unsigned short int

  
#include <stdio.h>
int main(void)
{
  short int i;  /* a signed short integer */
  unsigned short int u; /* an unsigned short integer */
  u = 303000;
  i = u;
  
  printf("%hd %hu", i, u);
  return 0;
}


Printf and scanf pair for int value

  
#include <stdio.h>
int main(void)
{
  int len, width;
  printf("Length: ");
  scanf("%d", &len);
  
  printf("Width: ");
  scanf("%d", &width);
  printf("Area = %d", len * width);
  return 0;
}


Simple int calculation

  
#include <stdio.h>
main() {
    int i,j,k;  
    
    scanf("%d%d",&i,&j); 
    k = i + j;
    printf("sum is %d \n",k);
}


Using a variable

/* Using a variable  */
#include <stdio.h>
void main()
{
  int s;              /* Declare a variable called s */
  s = 10000;            /* A simple arithmetic assignment statement */
  printf("s is %d.", s);
}
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