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Link: http://codepad.org/Rcp5KmqC    [ raw code | output | fork ]

C, pasted on Oct 30:
//gettysburg.txt

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

char *tmp,*m,*t;
char *cpy,*max;
int size=0,m1=0;
//Functions Declaration 
void lp();
void ispal();
//Program Starts Here 
int main()
{
	char c;
	int i=0;
	FILE *f;
f=fopen("gettysburg.txt","r+");
//Count the size of File & allocate size for a string 
	while(c!=EOF)
	{
	c=getc(f);
	size++;
	}
	tmp= (char *) malloc(size*sizeof(char));
	cpy= (char *) malloc(size*sizeof(char));
		c=' ';
//Copy chars from a file into a String 
	rewind(f);
	while(c!=EOF)
	{
	c=getc(f);
	tmp[i]=c;
	i++;
	}
	tmp[i]='\0';
lp();
return 0;

}

			
//Function For largest Palindrome
		void lp()
			{
			int len ,i, k,n,r;
			len= strlen(tmp); 
			t=(char *) malloc(size*sizeof(char));
				max=(char *) malloc(size*sizeof(char));
					for(i=0;i<(len);i++)
					{
							for(k=0;k<len;k++)
							{
							
								r=0;
								  for(n=i;n<((len-1)-k);n++)
									  {
									  t[r]=tmp[n];
									  r++;
									  }
								  t[n]='\0';
								ispal();
							}
					}
		//Here We go!!!! 
					printf("\n Largest palindrome %s ",max);
		}
//Function to check  Pal 
void ispal()
{
int l;
l=strlen(t);
strcpy(cpy,t);
strrev(cpy);
		if(strcmp(t,cpy)==0)
		{
			if(l>m1)
			{
			m1=l;
			strcpy(max,t);
			}
		}
}


Output:
1
2
In function `ispal':
undefined reference to `strrev'


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