String concatenation in C using strcat & pointers – 2 programs ~ mkniit ~ gniitsolution

String concatenation in C programming language using strcat & pointers. This is to concatenate the given input strings as one. It is a simple concatenation source code that generates the final output.

Here we have included the 2 example programs. They are,

• String concatenation using strcat,
• String concatenation using pointers

STRING CONCATENATION IN C

This C program is used to concatenate the two string values into the third string and print the value of string and combined two strings by using the strcat function & pointers. The header file is #include<string.h>. For example first value is ‘string’ and second value is ‘concatenation’ after strcat it will concatenate and stored in third value as ‘string concatenation’.

String concatenation codes:

1) C program for string concatenation using strcat function.

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//Header files #include <stdio.h> #include <string.h>   int main() {    //Program variable    char b[50], c[50];      printf("Enter the first value of string\n");//Display function    gets(b);//Getting input function      printf("Enter the second value of string\n");    gets(b);      strcat(b,c);//concatenation function      printf("After string  concatenation is %s\n",b);      return 0; }

2) Program in string concatenation using pointers

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//Header files #include<stdio.h> #include<conio.h>   char *xs(char*,char*);//Global variable void main() { char *s4,*s5,*s6;//Program variable clrscr(); puts("\t enter the first value of string:\n"); gets(s4); puts("\t enter the second value of string:"); gets(s5); s6=xs(s4,s5); printf("after concatenation of string is %s",s6); getch(); }   char *xs(char *s1,char *s2) {     char *p=s1;     /*int j,h=0;     while(*(s1+h)!='\0')     {         h++;       }     j=h;     h=0;     while(*(s2+h)!='\0')     {         *(s1+j)=*(s2+h);         h++;         j++;       } */       while(*s1!='\0')         s2++;       while(*s1!='\0')     {         *s1=*s2;         s1++;         s2++;     }       *s4='\0';     //fs4--;       return (p); }