Here is a C program to concatenate two strings using C function strcon(function). This program uses C concepts like For Loop in C, Auto Incrementing Operator ++ and Auto Decrementing Operator --.
Output of above program
Enter the first string : Awesome
Enter the second string : Weather
The concatenation string is : AwesomeWeather
# include <stdio.h>
# include <conio.h>
void main()
{
char str1[20], str2[20], strcon[40] ;
int i, j ;
clrscr() ;
printf("Enter the first string : ") ;
scanf("%s", str1) ;
printf("\nEnter the second string : ") ;
scanf("%s", str2) ;
for(i = 0 ; str1[i] != '\0' ; i++)
strcon[i] = str1[i] ;
i-- ;
for(j = 0 ; str2[j] != '\0' ; j++)
strcon[i+j+1] = str2[j] ;
strcon[i+j+1] = '\0' ;
printf("\nThe concatenation string is : %s", strcon) ;
getch() ;
}
Output of above program
Enter the first string : Awesome
Enter the second string : Weather
The concatenation string is : AwesomeWeather
Take a Look at: Examples of different operations on Strings
The strcat function concatenates a source string to destination string and adds a null character at the end of destination. Source string is not modified in this operation. It returns concatenated destination string. Length of destination string must be more than sum of original length of strings.