Untitled Document

Character Arrays - String manipulations:

96.grep command - whether given pattern/string exist or not(16.05.2010)

/*
Program# 96
date : 10-01-2009
Pattern matching --will work only if input given as i love this universe$universe$ In : i love this universe$ universe$ bug:because '\n' gets into b[0]
*/

#include <stdio.h>
main(){
char a[100],b[100];
int i,j,k;

i=0;
scanf("%c",&a[i]);
while(a[i]!='$'){
i++;
scanf("%c",&a[i]);
}
a[i]='\0';

j=0;
scanf("%c",&b[j]);
while(b[j]!='$'){
j++;
scanf("%c",&b[j]);
}
b[j]='\0';

i=0;
while(a[i]!='\0'){
j=0;
k=i;

while((b[j]==a[k]) && (b[j]!='\0')){
j++;
k++;
}

if(b[j]=='\0'){
printf("\nPattern exists");
return;
}else
i++;

}
printf("\n pattern not exists");
}