Two String values are passed as input. Find if the second string s2 is a substring of the first string s1. If it is, print the index of the first occurrence.Else print -1. Input make123India 123 Output 4
Two String values are passed as input. Find if the second string s2 is a substring of the first string
s1. If it is, print the index of the first occurrence.Else print -1.
Input
make123India
123
Output
4
*/
#include<iostream>
#include<string.h>
using namespace std;
int isSubstring(string s1, string s2)
{ int temp,j;
for(int i=0;s1[i]!='\0';i++)
{
j=0;
if(s1[i]==s2[j])
{
temp=i+1;
while(s1[i]==s2[j])
{
i++;
j++;
}
if(s2[j]=='\0')
{
return temp-1;
}
else
{
i=temp;
temp=0;
}
}
}
if(temp==0)
return -1;
}
int main(int argc, char const *argv[])
{
string s1,s2;
getline(cin,s1);
getline(cin,s2);
int res = isSubstring(s1,s2);
if(res==-1)
cout<<res;
else
cout<<"Found at index: "<<res;.
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