C Programming/String manipulation

 

Commonly-used string functions are

• strlen - get string length
• strcat - concatenate two strings
• strcmp - compare two strings
• strcpy - copy a string
• strupr – convert string in upper case
• strlwr – convert string in lower case
• strrev – convert string in reverse order

WAP to find length of a string.

 

#include <stdio.h>

#include <string.h>

void main()

{

     char str1[20] = "Welcome";

     printf("Length of string str1: %d", strlen(str1));

}

 

WAP to concatenate two strings.

 

#include <stdio.h>

#include <string.h>

void main()

{

     char str1[10] = "Wel";

     char str2[10] = "Come";

     printf("Concatenate of two string is : %s", strcat(str1,str2));

}

 

WAP to Sort strings in alphabetical order

 

#include<stdio.h>

#include<string.h>

void main(){

   int i,j,count;

   char str[25][25],temp[25];

   puts("How many strings u are going to enter?: ");

   scanf("%d",&count);

OUTPUT   How many strings u are going to enter?:                                                                                                3                                                                                                                                       Enter Strings one by one:                                                                                                              Ram                                                                                                                                     Ajay                                                                                                                                   Sanjay                                                                                                                                  Order of Sorted Strings:                                                                                                               Ajay                                                                                                                                    Ram                                                                                                                                    Sanjay

   puts("Enter Strings one by one: ");

   for(i=0;i<=count;i++)

      gets(str[i]);

   for(i=0;i<=count;i++)

      for(j=i+1;j<=count;j++){

         if(strcmp(str[i],str[j])>0){

            strcpy(temp,str[i]);

            strcpy(str[i],str[j]);

            strcpy(str[j],temp);

         }

      }

   printf("Order of Sorted Strings:");

   for(i=0;i<=count;i++)

      puts(str[i]);

}