#includeusing namespace std;char * Myitoa(int a) { char asign; char temp[12]; char result[1024]; int last,one,i=0,j=0; if(a<0) {asign='-'; a=-a;// cout< =0) result[j++]=temp[i--]; result[j]='\0'; return result;}int Myatoi(char * str){ int asign=1,result=0; if(str==NULL) { cout<<"invalue input"< (dest); char* pstr=static_cast (str); int a=0; if(pdest>pstr&&pdest