Strstr Function in C

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#include<stdio.h>

int fStrStr(char* str, char* strSub)

{

    int i=0, j=0;

    int nTemp = i;

    int nStrLen = strlen(str);

    int nStrSubLen = strlen(strSub);

    for(i=0; i<nStrLen-nStrSubLen; i++)

    {

        nTemp = i;

        for(j=0; j<nStrSubLen; j++)

        {

            if(str[nTemp]==strSub[j])

            {

                if(j==nStrSubLen-1)

                    return 1;

                nTemp++;

            }

            else

                break;

        }

    }

    return 0;

}