main()
{
char a[100],b[100];
strcpy(a, "hello");
rev_str(a,b);
printf("%s", b); // this prints "olleh"
}
int main(int argc, char *argv[])
{
char * str;
str = malloc(sizeof(40000));
rev_str(str);
printf("%s", str);
return 0;
}
char *multiply(char *num1, char *num2)
{
if (!num1 || !num2)
return(0);
int l1, l2, i, j, t, c, max;
char *num1_r, *num2_r, *res_r;
if (!(l1 = strlen(num1)) || !(l2 = strlen(num2)))
return(0);
num1_r = rev_str(num1, l1);
num2_r = rev_str(num2, l2);
res_r = calloc(l1 + l2, sizeof(char));
c = 0;
max = 0;
for (i = 0; i < l1; i++) {
for (j = 0; j < l2; j++) {
t = (num1_r[i] - '0') * (num2_r[j] - '0');
t += c;
res_r[i + j] += t;
c = res_r[i + j] / 10;
res_r[i + j] %= 10;
}
if (c) {
max = i + j;
res_r[max] += c;
c = 0;
} else {
max = i + j - 1;
}
}
free(num1_r);
free(num2_r);
num1_r = calloc(max + 2, sizeof(char));
i = max;
j = 0;
while (i >= 0)
num1_r[j++] = res_r[i--] + '0';
free(res_r);
if (num1_r[0] == '0')
num1_r[1] = 0;
return(num1_r);
}
void rev_str(char* s)
{
if(*s != '\0')
rev_str(s+1);
printf("%c",*s);
}
main()
{
char str1[100],str2[100];
int d,i,j;
clrscr();
printf( "Enter a string \n " );
scanf( "%[^\n]",str1);
for(d=0;str1[d]!='\0';d++);
rev_str(str1,d);
getch();
}
void *rev_str(char *a,char *b)
{
if(*a=='\0'){
*b='\0';
return;
}
*b=*(a+strlen(a)-1);
*(a+strlen(a)-1)='\0';
rev_str(a,b+1);
}
int main(int argc, const char * argv[])
{
rev_str("born2c0de");
return 0;
//test code
/* MyClass Obj;
Obj.x = 10;
Obj.y = 20;
char *p;
p = (char*) malloc(sizeof(char)+ 1);
sprintf(p, "%d", Obj.add());
sprintf((p+2), "%d", Obj.add() + 9);
std::cout << p;
std::cout << *(p + 2);
free(p);
*/
//Stack code
/* Stack myStack;
myStack.push(100);
myStack.push(200);
myStack.push(400);
myStack.push(500);
std::cout << myStack.pop();
std::cout << myStack.pop();
std::cout << myStack.pop();
std::cout << myStack.pop();
std::cout << myStack.pop();
//Queue code
Queue myQueue;
myQueue.add(100);
myQueue.add(200);
myQueue.add(300);
myQueue.add(400);
myQueue.del();
myQueue.del();
myQueue.del();
myQueue.add(500);
myQueue.add(600);
myQueue.display();
/*myQueue.del();
myQueue.del();
myQueue.del();
myQueue.del();
myQueue.del();
myQueue.del();
myQueue.display();
*/
return 0;
}
static void my_itoa(int nb, char *str)
{
int i;
if (nb < 0)
nb *= -1;
i = 0;
while ((nb / 10) > 0)
{
str[i] = (nb % 10) + '0';
nb = nb / 10;
++i;
}
str[i] = (nb % 10) + '0';
++i;
str[i] = '\0';
rev_str(str);
}
