C String

#include <stdio.h>

void myStrcat(char *a, char *b)
{
    int m = strlen(a);
    int n = strlen(b);
    int i;
    for (i = 0; i <= n; i++)
       a[m+i]  = b[i];
}

int main()
{
    char *str1 = \"Geeks \";
    char *str2 = \"Quiz\";
    myStrcat(str1, str2);
    printf(\"%s \", str1);
    return 0;
}

# include <stdio.h>

int main()
{
   char str1[] = \"GeeksQuiz\";
   char str2[] = {\'G\', \'e\', \'e\', \'k\', \'s\', \'Q\', \'u\', \'i\', \'z\'};
   int n1 = sizeof(str1)/sizeof(str1[0]);
   int n2 = sizeof(str2)/sizeof(str2[0]);
   printf(\"n1 = %d, n2 = %d\", n1, n2);
   return 0;
}

#include<stdio.h>
void swap(char *str1, char *str2)
{
  char *temp = str1;
  str1 = str2;
  str2 = temp;
}  
  
int main()
{
  char *str1 = \"Geeks\";
  char *str2 = \"Quiz\";
  swap(str1, str2);
  printf(\"str1 is %s, str2 is %s\", str1, str2);
  return 0;
}

#include <stdio.h>
int fun(char *str1)
{
  char *str2 = str1;
  while(*++str1);
  return (str1-str2);
}

int main()
{
  char *str = \"GeeksQuiz\";
  printf(\"%d\", fun(str));
  return 0;
}

 char c[] = \"GATE2011\"; 
 char *p =c; 
 printf(\"%s\", p + p[3] - p[1]) ;

#include<stdio.h>
int main()
{
    char str[] = \"GeeksQuiz\";
    printf(\"%s %s %s \", &str[5], &5[str], str+5);
    printf(\"%c %c %c \", *(str+6), str[6], 6[str]);
    return 0;
}

int main()
{
    char a[2][3][3] = {\'g\',\'e\',\'e\',\'k\',\'s\',\'q\',\'u\',\'i\',\'z\'};
    printf(\"%s \", **a);
    return 0;
}

 char p[20]; 
 char *s = \"string\"; 
 int length = strlen(s); 
 int i; 
 for (i = 0; i < length; i++) 
     p[i] = s[length — i]; 
 printf(\"%s\", p);

#include <stdio.h>
 
void my_toUpper(char* str, int index)
{
    *(str + index) &= ~32;
}
 
int main()
{
    char* arr = \"geeksquiz\";
    my_toUpper(arr, 0);
    my_toUpper(arr, 5);
    printf(\"%s\", arr);
    return 0;
}

#include <stdio.h>
int main()
{
    char str[] = \"%d %c\", arr[] = \"GeeksQuiz\";
    printf(str, 0[arr], 2[arr + 3]);
    return 0;
}