/* Enter a IP Addres as an input,This program Check Whether the Given IP Addres is Valid IPv4 address or Not. A valid IP address should be in the form of: a.b.c.d where a, b, c and d are integer values ranging from 0 to 255 inclusive. For example: 127.0.0.1 - valid 127.255.255.255 - valid 257.0.0.1 - invalid 255a.0.0.1 - invalid 127.0.0.0.1 - invalid */ #include #include using namespace std; int Number_Check(char *str) { int i,num,n=0,arr[5],num_valid=1; for(i=0;str[i]!='\0';i++) { num=0; while(str[i]!='.' && str[i]!='\0'){ num=num*10+str[i]-'0'; i++; } if(num>=0 && num<=255) arr[n++]=1; else arr[n++]=0; } for(i=0;i<=3;i++) num_valid=num_valid && arr[i]; return num_valid; } int Length_Check(char *str) { int len=strlen(str); if(len>=7 && len<=15) return 1; else return 0; } int Dots_Check(char *str) { int i,dot_valid=0; for(i=0;str[i]!='\0';i++) { if(str[i]=='.') dot_valid++; } if(dot_valid==3) return 1; else return 0; } int String_Check(char *str) { int i,str_valid=1; for(i=0;str[i]!='\0';i++) { if((str[i]>=48 && str[i]<=57) || str[i]=='.') str_valid = str_valid && 1; else str_valid = str_valid && 0; } return str_valid; } int Check_IP(char *str) { int str_valid= String_Check(str); int dot_valid= Dots_Check(str); int len_valid= Length_Check(str); int num_valid= Number_Check(str); /* cout<<"Length : "< Length of the IPv4 address is from 7 to 15 Characters."; if(!dot_valid) cout<<"\n-> IPv4 address can contain only 3 Dots."; if(!str_valid) cout<<"\n-> IPv4 address can contain only Digits and Dots."; if(!num_valid) cout<<"\n-> IPv4 address in Form of a.b.c.d \n\t\twhere a, b, c and d are integer values ranging from 0 to 255 inclusive."; if(len_valid && dot_valid && str_valid && num_valid) return 1; else return 0; } int main() { char address[20]; // cout<<"Enter a IP Address : "; cin.getline(address,20); cout<<"Entered IP Address : "<

IP ADDRESS CHECKER (C31)