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C programs QnA

Q. If sum of two integer is 14 and if one of them is 8 then find other integer. Ans: Well, this is very simple. Simply, one integer is 8 and sum of two integers is 14. So, we need to subtract the number 8 from their sum of 14 to get the second number. So, the second number is: 14 - 8 = 6 C-Program of this task Code---> #include<stdio.h> int main () { int num1 = 8 , num2 , sum = 14 ; num2 = sum - num1 ; printf ( "The second number is: %d" , num2 ); return 0 ; }
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String Concatenation without using strcat() function in C Language



In this C program we will concatenate two strings without using strcat()fuction. The Strings will be given by the User.
If gets() function doesn't working for you, change the gets() lines by 
scanf("%[^\n]%*c", str1);
 and 
scanf("%[^\n]%*c", str2);
Learn about different string functions and their use: Different String Functions

input:

The Strings.

output:

The concatenated string will be printed on the screen. (i.e: First string + Second string)

CODE---->


#include<stdio.h>
#include<stdlib.h>
void STRCAT(char *s1,char *s2)
{
 while(*s1!='\0')
 {
  s1++;
 }
 while(*s2!='\0')
 {
  *s1=*s2;
  s1++;
  s2++;
 }
 *s1='\0';
}
int main()
{
 char str1[100],str2[100];
 printf("Please, Enter the First String: ");
 gets(str1);
 printf("Please, Enter the second String: ");
 gets(str2);
 STRCAT(str1,str2);
 printf("After concatenation: %s",str1);
 return 0;
}

Download the C-Program file of this Program.

Don't just read, run on your pc !!!


RESULT :


Please, Enter the First String: Programming is fun 
Please, Enter the second String: with ProgramJoy
After concatenation: Programming is fun with ProgramJoy
--------------------------------
Process exited after 35.27 seconds with return value 0
Press any key to continue . . .


Images for better understanding :


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