C Program to Detection of a Prime Number

How to write a C Program to Detection of a Prime Number in C Programming Language ?

Write a program to determine whether a number is prime or not. 

Note :A prime number is one, which is divisible only by 1 or itself. 

1. #include<stdio.h>
2. main()
3. {
4. int num, i;
5.  
6. printf ("Enter a number:");
7. scanf ("%d", &num);
8.  
9. i=2;
10. while (i<=num - 1)
11.  
12. {
13. if (num % i ==0)
14.  
15. {
16. printf ("Not a prime number");
17. break;
18. }
19.  
20. i++;
21. }
22.  
23. if (i == num)
24.  
25. printf ("Prime Number");
26. }

C Program for error detecting code using CRC-CCITT (16bit)

How to write a C Program for error detecting code using CRC-CCITT (16bit) in C Programming Language ?

Solution:

1. #include<stdio.h>
2. char m[50],g[50],r[50],q[50],temp[50];
3. void caltrans(int);
4. void crc(int);
5. void calram();
6. void shiftl();
7. int main()
8. {
9. int n,i=0;
10. char ch,flag=0;
11. printf("Enter the frame bits:");
12. while((ch=getc(stdin))!='\n')
13. m[i++]=ch;
14. n=i;
15. for(i=0;i<16;i++)
16. m[n++]='0';
17. m[n]='\0';
18. printf("Message after appending 16 zeros:%s",m);
19. for(i=0;i<=16;i++)
20. g[i]='0';
21. g[0]=g[4]=g[11]=g[16]='1';g[17]='\0';
22. printf("\ngenerator:%s\n",g);
23. crc(n);
24. printf("\n\nquotient:%s",q);
25. caltrans(n);
26. printf("\ntransmitted frame:%s",m);
27. printf("\nEnter transmitted freme:");
28. scanf("\n%s",m);
29. printf("CRC checking\n");
30. crc(n);
31. printf("\n\nlast remainder:%s",r);
32. for(i=0;i<16;i++)
33. if(r[i]!='0')
34. flag=1;
35. else
36. continue;
37. if(flag==1)
38. printf("Error during transmission");
39. else
40. printf("\n\nReceived freme is correct");
41. }
42. void crc(int n)
43. {
44. int i,j;
45. for(i=0;i<n;i++)
46. temp[i]=m[i];
47. for(i=0;i<16;i++)
48. r[i]=m[i];
49. printf("\nintermediate remainder\n");
50. for(i=0;i<n-16;i++)
51. {
52. if(r[0]=='1')
53. {
54. q[i]='1';
55. calram();
56. }
57. else
58. {
59. q[i]='0';
60. shiftl();
61. }
62. r[16]=m[17+i];
63. r[17]='\0';
64. printf("\nremainder %d:%s",i+1,r);
65. for(j=0;j<=17;j++)
66. temp[j]=r[j];
67. }
68. q[n-16]='\0';
69. }
70. void calram()
71. {
72. int i,j;
73. for(i=1;i<=16;i++)
74. r[i-1]=((int)temp[i]-48)^((int)g[i]-48)+48;
75. }
76. void shiftl()
77. {
78. int i;
79. for(i=1;i<=16;i++)
80. r[i-1]=r[i];
81. }
82. void caltrans(int n)
83. {
84. int i,k=0;
85. for(i=n-16;i<n;i++)
86. m[i]=((int)m[i]-48)^((int)r[k++]-48)+48;
87. m[i]='\0';
88. }

OUTPUT:-

[root@localhost nwcn]# vi 1.c

[root@localhost nwcn]# cc 1.c

[root@localhost nwcn]# ./a.out

Enter the binary data

1011

The msg before adding checksum:

10110000000000000000

The checksum calculated:

1011000101101011

The code word is:10111011000101101011

Enter the transmitted code word

10111011000101101011

Received msg:10111011000101101011

The checksum is:0000000000000000

No error in the msg

[root@localhost nwcn]# cc 1.c

[root@localhost nwcn]# ./a.out

Enter the binary data

1101

The msg before adding checksum:

11010000000000000000

The checksum calculated:

1101000110101101

The code word is:11011101000110101101

Enter the transmitted code word

10111101000110101101

Received msg:10111101000110101101

The checksum is:0110000011000110

Error in the msg

C Program Code for position detection

How to write a C Program Code for Position Detection in C Programming Language ?

Solution:

/* This is an example for the Adafruit MMA8451 Accel breakout board*/


#include <Wire.h>
#include<Time.h>
#include <Adafruit_MMA8451.h>
#include <Adafruit_Sensor.h>

Adafruit_MMA8451 mma = Adafruit_MMA8451();
double x=0,y=0,z=0,ux=0,uy=0,uz=0,ax=0,ay=0,az=0;

void setup(void) {
  Serial.begin(9600);
 
  Serial.print("Adafruit MMA8451 test!");
 

  if (! mma.begin()) {
    Serial.print("Couldnt start");
    while (1);
  }
  Serial.print("MMA8451 found!");
 
  mma.setRange(MMA8451_RANGE_2_G);
 
  Serial.print("Range = "); Serial.print(2 << mma.getRange());
  Serial.print("G");
 
}

void loop() {
  // Read the 'raw' data in 14-bit counts
 
  mma.read();
// Serial.print("X:\t"); Serial.print(mma.x);
  //Serial.print("\tY:\t"); Serial.print(mma.y);
  //Serial.print("\tZ:\t"); Serial.print(mma.z);
  //Serial.println();

  /* Get a new sensor event */
  sensors_event_t event;
  mma.getEvent(&event);

  /* Display the results (acceleration is measured in m/s^2) */
  x=((ux+ ((ax)*(second()-1)))*(second()-1) + 0.5 * (ax) * ((second()-1) * (second()-1)));
  y=((uy+ ((ay)*(second()-1)))*(second()-1) + 0.5 * (ay) * ((second()-1) * (second()-1)));
  z=((uz+ ((az)*(second()-1)))*(second()-1) + 0.5 * (az) * ((second()-1) * (second()-1)));

  ux=(ux+ ((ax)*(second()-1)));
  uy=(uy+ ((ay)*(second()-1)));
  uz=(uz+ ((az)*(second()-1)));

  ax=event.acceleration.x;
  ay=event.acceleration.y;
  az=event.acceleration.z;

 
  Serial.print(x); Serial.print(",");
  Serial.print(y); Serial.print(",");
  Serial.print(z); Serial.print(",");

//  Serial.print(event.acceleration.y); Serial.print(".");
//  Serial.print(event.acceleration.z); Serial.print(".");
  Serial.print(second()); Serial.print("#");
 

 
  /* Get the orientation of the sensor */
  uint8_t o = mma.getOrientation();
 
  switch (o) {
    case MMA8451_PL_PUF:
    //  Serial.println("Portrait Up Front");
      break;
    case MMA8451_PL_PUB:
      //Serial.println("Portrait Up Back");
      break;  
    case MMA8451_PL_PDF:
   //   Serial.println("Portrait Down Front");
      break;
    case MMA8451_PL_PDB:
     // Serial.println("Portrait Down Back");
      break;
    case MMA8451_PL_LRF:
     // Serial.println("Landscape Right Front");
      break;
    case MMA8451_PL_LRB:
      //Serial.println("Landscape Right Back");
      break;
    case MMA8451_PL_LLF:
      //Serial.println("Landscape Left Front");
      break;
    case MMA8451_PL_LLB:
      //Serial.println("Landscape Left Back");
      break;
    }
  Serial.println();
  delay(1000);
 
}

C Program to Detect int Underflow-Overflow using if-else

How to write a C Program to detect integer overflow-underflow in C Programming Language ?

Solution:
/*Program detect overflow-underflow in C*?
#include<stdio.h>
int main()
{
    unsigned long long int a,b,i;
    while(scanf("%llu",&a)!=EOF)
    {
        if(a<8)
        {
            printf("Underflow!\n");
        }
        else if(a<14)
        {
        b=1;
        for(i=1;i<=a;i++)
        {
            b=b*i;

        }
                       printf("%llu\n",b);
        }
        else
        {
            printf("Overflow!\n");
        }


    }
    return 0;
}