Write a program without using library functions ?

Answer : C Standard library functions are inbuilt functions in C programming…

Write a program without using library functions ?

  • C Standard library functions or simply C Library functions are inbuilt functions in C programming.
  • The prototype and data definitions of the functions are present in their respective header files, and must be included in your program to access them.
  • If you want to use printf() function, the header file <stdio.h> should be included. For example,

Copy String Manually Without Using strcpy()

  • In this C Program we have to copy the string without using library functions.

Sample Code

#include <stdio.h>
int main()
{
    char str1[100], str2[100], j;

    printf("Enter the string str1: ");
    scanf("%s",str1);

    for(j = 0; str1[j] != '
#include <stdio.h>
int main()
{
char str1[100], str2[100], j;
printf("Enter the string str1: ");
scanf("%s",str1);
for(j = 0; str1[j] != '\0'; ++j)
{
str2[j] = str1[j];
}
str2[j] = '\0';
printf("String str2: %s", str2);
return 0;
}
'; ++j) { str2[j] = str1[j]; } str2[j] = '
#include <stdio.h>
int main()
{
char str1[100], str2[100], j;
printf("Enter the string str1: ");
scanf("%s",str1);
for(j = 0; str1[j] != '\0'; ++j)
{
str2[j] = str1[j];
}
str2[j] = '\0';
printf("String str2: %s", str2);
return 0;
}
'; printf("String str2: %s", str2); return 0; }

Output

Enter the String str1: Wikitechy
 String str2: Wikitechy
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