Program to compare two strings


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Program to compare two strings

To compare any two string first we need to find length of each string and then compare both strings. If both string have same length then comapre character by character of each string.

Program to compare two string

#include<stdio.h>
#include<conio.h>

void main()
 {
 char str1[20],str2[20],i,j,flag=0;
 clrscr();
 printf("Enter first string: ");
 gets(str1);
 printf("Enter Second string: ");
 gets(str2);
 i=0;
 j=0;
  while(str1[i]!='\0')
  {
   i++;
  }
  while(str2[j]!='\0')
  {
   j++;
  }
 if(i!=j)
 {
 flag=0;
 }
 else
 {
 for(i=0,j=0;str1[i]!='\0',str2[j]!='\0';i++,j++)
 {
 if(str1[i]==str2[j])
 {
 flag=1;
 }
 }
 }
 if(flag==0)
 {
 printf("Strings are not equal");
 }
 else
 {
 printf("Strings are equal");
 }
 getch();
}

Output

Enter First String : rajess
Enter Second String : rajesh
Strings are not equal

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