Use of built-in C string library function.

// Use of built-in C string library function. #include<stdio.h> int main() {      int len;      char str1[10], str2[10];           puts("Enter String 1:");      gets(str1);           puts("Enter String 2:");      gets(str2);           //Function to find length of given string 1.      len = strlen(str1);      printf("\nLength of String 1 is %d.\n", len);           //Function to compare two strings      if(strcmp(str1,str2)==0)            printf("\nString 1 and String 2 are same.\n");      else            printf("\nString 1 and String 2 are not same.\n");                 //Function to copy string 1 into string 2      strcpy(str2,str1); //this will copy str1 into str2      printf("\nString 2 after execution of strcpy = %s", str2);           return 0; }

Output of the program:

/*Output

Enter String 1:

abc

Enter String 2:

xyz

Length of String 1 is 3.

String 1 and String 2 are not same.

String 2 after execution of strcpy = abc

*/