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#include
   
    int strcmp(char *source, char *dest){    int m,n,i,flag;    m = strlen(source);    n = strlen(dest);    if(m!=n)        flag = -1;    if(source==NULL&&dest==NULL)    {        flag = 0;    }    if(source!=NULL&&dest!=NULL)    {        while(*source==*dest&&*source!='\0')        {             source++;dest++;        }        if(*dest=='\0')            flag = 0;        else            flag = -1;    }    else        flag = -1;    return flag;}void main(){    int i;    char *str = "hello";    char *str1 = "hello";    i = strcmp(str,str1);    printf("%d",i);}
   

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