IC Lab - Semester 1

Here is a list of programs done for the IC Lab in the first semester.


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STRING Q1

posted Dec 3, 2010, 10:23 AM by Neil Mathew   [ updated Dec 3, 2010, 10:29 AM ]


* Al ot of string functions are not working. strrev, strlwr, strupr, stricmp...

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#include<stdio.h>
#include<string.h>
 
void StringER(char *S1, char *S2)
{
char S3[50];
char *S4;
 
printf("\n");
//Copy and Duplicate a String.
 
strcpy(S3," Samuel");
S4=strdup(S3); //returns a pointer
 
printf("\n Copied String : %s", S3);
printf("\n Duplicated String : %s", S4);
 
 
//printf("\n");
//Cases
 
//char *sL=strlwr("HELP");
//printf("\n HELP or %s",sL);
  
printf("\n");
//Comparison with strcmp() stricmp() | Others: strncmp() strnicmp() 
 
if( strcmp(S1,S2)==0)
printf("\n String 1 and 2 are the same. Case Sensitive ");
 
//else if(B==0)
//printf("\n String 1 and 2 are the . Not Case Sensitive ");
 
else if ( strncmp(S1, S2, 2) == 0)
{printf("\n First 2 characters of String 1 and 2 are the same.");
printf(" Case Sensitive"); }
 
//else if ( strnicmp(S1,S2,2) == 0 )
/*printf("\n First 2 characters of String 1 and 2 
are the same. Not Case Sensitive"); */
 
else
printf("\n String 1 and 2 are NOT the same. Case Sensitive ");
 
 
printf("\n");
//Concatenate with S3
 
strcat(S1,S3); // pointer and array both can be used. *S1 S3[]
printf("\n Concatenated String : %s",S1);
 
strncat(S2,S3,4);
printf("\n Concatenated String : %s",S2);
 
//printf("\n");
//reverse
//char *sR=strrev(S1);
//printf("\n Reversed String : %s",sR);
 
}
 
main()
{
 
char S1[50];
char S2[50];
 
printf(" Enter the String 1 : ");
gets(S1);
 
printf(" Enter the String 2 : ");
gets(S2);
 
StringER(S1,S2); 
/* No & (ampersand) for Strings in scanf 
and pointers - ptr=S1; unlike ptr=&a;  */
 
}

OUTPUT:

 Enter the String 1 : Hello
 Enter the String 2 : HeLLo

 Copied String :  Samuel
 Duplicated String :  Samuel

 First 2 characters of String 1 and 2 are the same. Case Sensitive

 Concatenated String : Hello Samuel 
 Concatenated String : HeLLo Sam

IF( )

posted Dec 3, 2010, 10:19 AM by Neil Mathew   [ updated Dec 3, 2010, 10:20 AM ] 


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main()
{
 
if(0) // 0 = false
printf(" checks if ==0 , if 0 false, ");
 
if(6) // 6 = non zero = true
printf(" checks if ==0 , if non zero true ");
 
}

OUTPUT:

checks if ==0 , if non zero true

STRING Q2

posted Dec 3, 2010, 10:17 AM by Neil Mathew   [ updated Dec 3, 2010, 10:19 AM ] 


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#include <stdio.h>
#include <string.h>
 
int main ()
{
  char str[] ="This is a line";
  char *p;
  
  p = strstr (str, " ");
  puts (p);
 
  p = strchr (str, 'i');
  puts (p);
 
  p = strrchr (str, 'i');
  puts (p);
  
  return 0;
}

 OUTPUT:

 is a line
is is a line
ine

ERROR in DATA FILE

posted Dec 2, 2010, 4:32 PM by Neil Mathew   [ updated Dec 2, 2010, 4:49 PM ]

  • 1:  // file error handling 
    2:  #include <stdio.h> 
    3:   
    4:  #define ERR_OPEN_1 11 
    5:  #define ERR_OPEN_2 12 
    6:  #define ERR_READ 13 
    7:  #define ERR_WRITE 14 
    8:   
    9:  int f_err_report(int mode) { 
    10:   if(mode==ERR_OPEN_1) printf("error opening file1n"); 
    11:   if(mode==ERR_OPEN_2) printf("error opening file2n"); 
    12:   else if(mode==ERR_READ) printf("error reading from file"); 
    13:   else if(mode==ERR_WRITE) printf("error writing to file"); 
    14:   exit(1); 
    15:  } 
    16:   
    17:  int main(int argc, char *argv[]) 
    18:  { 
    19:   if(argc<3) { printf("%s <file1> <file2>n",argv[0]); exit(1); } 
    20:   char ch; 
    21:   FILE *fp,*fp2; 
    22:   if((fp=fopen(argv[1],"r"))==NULL) f_err_report(ERR_OPEN_1); 
    23:   if((fp2=fopen(argv[2],"w"))==NULL) f_err_report(ERR_OPEN_2); 
    24:   while(!feof(fp)) { 
    25:    ch=getc(fp); 
    26:    if(ferror(fp)) f_err_report(ERR_READ); 
    27:    if(!feof(fp)) 
    28:    putc(ch,fp2); 
    29:    else break; 
    30:    if(ferror(fp)) f_err_report(ERR_WRITE); 
    31:   } 
    32:   fclose(fp); 
    33:   fclose(fp2); 
    34:   return 0; 
    35:  } 
    36:  



    • WAP to swap two numbers without using another variable.

    posted Dec 1, 2010, 8:25 PM by Neil Mathew   [ updated Dec 1, 2010, 8:48 PM ]

    SOURCE CODE:

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    #include<stdio.h>
 
int main()
{
 
int a,b;
 
printf("\n Enter the value of A: ");
scanf("%d",&a);
 
printf(" Enter the value of B: ");
scanf("%d",&b);
 
//Swapping:
 
a=a+b;
b=a-b;
a=a-b;
 
printf("\n After Swapping... \n");
 
printf(" A: %d", a);
printf("\n B: %d", b);
 
return 0;
}


    OUTPUT:

     Enter the value of A: 10
 Enter the value of B: 20

 After Swapping... 
 A: 20
 B: 10

    WAP to display text on screen.

    posted Nov 18, 2010, 4:42 AM by Neil Mathew   [ updated Nov 18, 2010, 4:44 AM ]


    SOURCE CODE:

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    #include<stdio.h>
     
    int main()
    {
    printf(" Welcome to Neil's Practical File. XD ");
    return 0;
    }

     

    OUTPUT:

     Welcome to Neil's Practical File. XD

     

    WAP to display the multiplication table of entered number.

    posted Nov 18, 2010, 4:41 AM by Neil Mathew   [ updated Nov 18, 2010, 4:44 AM ]


    SOURCE CODE:

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    #include<stdio.h>
     
    int main()
    {
    int i,n,a;
     
    printf("\nEnter the number whose table is to be printed : ");
    scanf("%d",&n);
    for(i=1;i<11;i++)
    {
    a=n*i;
    printf("%dx%i=%d \n",n,i,a);
    }
    return 0;
    }
     

     

     

    OUTPUT:

     

    Enter the number whose table is to be printed : 5
    5x1=5 
    5x2=10 
    5x3=15 
    5x4=20 
    5x5=25 
    5x6=30 
    5x7=35 
    5x8=40 
    5x9=45  
    5x10=50  

     


    WAP to check which of the two entered numbers is greater.

    posted Nov 18, 2010, 4:40 AM by Neil Mathew   [ updated Nov 18, 2010, 4:44 AM ]


    SOURCE CODE:

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    #include <stdio.h>
     
    main ()
    {
     
    int a,b,c;
    printf("\n Enter two Numbers: ");
    scanf("%d%d",&a,&b);
     
    c=a ? b:a ;
    printf("\n Greater number of the two is : %d \n",c);
    }
     

     

     

    OUTPUT:

     

     Enter two Numbers: 5 357
     Greater number of the two is : 357

     


    WAP to enter and retrieve a character from a file.

    posted Nov 18, 2010, 4:39 AM by Neil Mathew   [ updated Nov 18, 2010, 4:45 AM ]

    SOURCE CODE:

     

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    #include <stdio.h>
    main()
    {
         char ch;
         FILE *file;
         file = fopen("abc.txt", "w");
     
         printf("\nEnter any character into FILE: ");
         scanf("%c", &ch);
     
         putc(ch, file);
         fclose(file);
     
         file = fopen("abc.txt", "r");
     
         ch = getc(file);
         printf("\nEntered Character from FILE: %c", ch);
    }
     

    WAP to copy the contents of one file to another.

    posted Nov 18, 2010, 4:39 AM by Neil Mathew   [ updated Nov 18, 2010, 4:44 AM ]

    SOURCE CODE:

     

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    #include <stdio.h>
    main()
    {
             char ch;
     
         FILE *fp1, *fp2;
         fp1 = fopen("abc.txt", "r");
         fp2 = fopen("xyz.txt", "w");
     
         while((ch = getc(fp1)) != EOF)
              putc(ch, fp2);
     
         fclose(fp1);
         fclose(fp2);
         return 0;
    }
     

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