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1.Creating files with Constructor function #include int main() { ofstream fout("data1.txt"); char name[20]; cout<<"Enter Name:"; cin>>name; fout<>branch; fout<>name1; fin>>branch1; cout<<"\n Name: "<>name; fout<>branch; fout<>name1; fin>>branch1; cout<<"\n Name: "<
3.using multiple files simultaneously #include int main() { ifstream fin1,fin2; fin1.open("data1.txt"); fin2.open("data2.txt"); char name1[20],branch1[10]; char name2[20],branch2[10]; fin1>>name1; fin1>>branch1; fin2>>name2; fin2>>branch2; cout<<"\n Name1: "<>name; int l=strlen(name); for(int i=0;i>name; int l=strlen(name); f1.write((char *) &name,sizeof(name)); f1.seekg(0); //go to start f1.read((char *) &name1,sizeof(name1)); cout<<"\n name="<
return 0; } 6. Reading and Writing Class Objects class student { char name[20]; int num; char branch[10]; public: void getdata(void); void putdata(void); }; void student::getdata(void) { cout<<"Enter name: "; cin>>name; cout<<"Enter number: ";cin>>num; cout<<"Enter branch: ";cin>>branch; } void student::putdata(void) { cout<<"\n \t"<
7. Random Access : Class Objects class student { char name[20]; int num; char branch[10]; public: void getdata(void); void putdata(void); }; void student::getdata(void) { cout<<"Enter name: "; cin>>name; cout<<"Enter number: ";cin>>num; cout<<"Enter branch: ";cin>>branch; } void student::putdata(void) { cout<<"\n \t"<>obj;
int loc=(obj-1) * sizeof(s); // Reaching the first byte of the object to be modified if(file.eof()) file.clear(); file.seekp(loc); cout<<"\n Enter new values of objects:\n"; s.getdata(); file.write((char *) & s,sizeof(s)); file.seekg(0); while(file.read((char *) & s,sizeof(s))) s.putdata(); file.close(); return 0; }
Exception Handling 1./* Try Block Throwing Exception */ int main() { int a,b; cout<<"Enter a , b"; cin>>a>>b; try { if(b!=0) cout<<"Division Result = "<
division(10,5); division(3,0); } catch(int i) { cout<<"\n Caught The Exception \n"; } cout<<"End"; return(0); } 3./* Multiple catch statements */ void multi_catch(int x) { try { if(x==1) throw x; else if (x==0) throw 'a'; else if (x==-1) throw 1.5; cout<<"TryBlock"<<endl; } catch(char c) { cout<<"Caught a character"<
multi_catch(1); multi_catch(0); multi_catch(-1); multi_catch(2); cout<<"End"; return(0); } 5./* Catching all exceptions */ void multi_catch(int x) { try { if(x==1) throw x; else if (x==0) throw 'a'; else if (x==-1) throw 1.5; cout<<"TryBlock"<<endl; } catch(int p) { cout<<"Caught An integer "<
division(3,0); } catch(int i) { cout<<"\n Caught inside main \n"; } cout<<"End"; return(0); } 7./* Specifying Exceptions */ void multi_catch(int x) throw(int,float) { if(x==1) throw x; else if (x==0) throw 'a'; else if (x==-1) throw 1.5; cout<<"TryBlock"<<endl; } int main() { clrscr(); try { multi_catch(1); multi_catch(0); multi_catch(-1); multi_catch(2); } catch(int p) { cout<<"\n Caught an integer"<<endl; } catch(char c) { cout<<"\n Caught a character"<<endl; } catch(float q) { cout<<"\n Caught a float"<<endl; } cout<<"End"; return(0); }
3.using multiple files simultaneously #include
return 0; } 6. Reading and Writing Class Objects class student { char name[20]; int num; char branch[10]; public: void getdata(void); void putdata(void); }; void student::getdata(void) { cout<<"Enter name: "; cin>>name; cout<<"Enter number: ";cin>>num; cout<<"Enter branch: ";cin>>branch; } void student::putdata(void) { cout<<"\n \t"<
7. Random Access : Class Objects class student { char name[20]; int num; char branch[10]; public: void getdata(void); void putdata(void); }; void student::getdata(void) { cout<<"Enter name: "; cin>>name; cout<<"Enter number: ";cin>>num; cout<<"Enter branch: ";cin>>branch; } void student::putdata(void) { cout<<"\n \t"<
int loc=(obj-1) * sizeof(s); // Reaching the first byte of the object to be modified if(file.eof()) file.clear(); file.seekp(loc); cout<<"\n Enter new values of objects:\n"; s.getdata(); file.write((char *) & s,sizeof(s)); file.seekg(0); while(file.read((char *) & s,sizeof(s))) s.putdata(); file.close(); return 0; }
Exception Handling 1./* Try Block Throwing Exception */ int main() { int a,b; cout<<"Enter a , b"; cin>>a>>b; try { if(b!=0) cout<<"Division Result = "<
division(10,5); division(3,0); } catch(int i) { cout<<"\n Caught The Exception \n"; } cout<<"End"; return(0); } 3./* Multiple catch statements */ void multi_catch(int x) { try { if(x==1) throw x; else if (x==0) throw 'a'; else if (x==-1) throw 1.5; cout<<"TryBlock"<<endl; } catch(char c) { cout<<"Caught a character"<
multi_catch(1); multi_catch(0); multi_catch(-1); multi_catch(2); cout<<"End"; return(0); } 5./* Catching all exceptions */ void multi_catch(int x) { try { if(x==1) throw x; else if (x==0) throw 'a'; else if (x==-1) throw 1.5; cout<<"TryBlock"<<endl; } catch(int p) { cout<<"Caught An integer "<
division(3,0); } catch(int i) { cout<<"\n Caught inside main \n"; } cout<<"End"; return(0); } 7./* Specifying Exceptions */ void multi_catch(int x) throw(int,float) { if(x==1) throw x; else if (x==0) throw 'a'; else if (x==-1) throw 1.5; cout<<"TryBlock"<<endl; } int main() { clrscr(); try { multi_catch(1); multi_catch(0); multi_catch(-1); multi_catch(2); } catch(int p) { cout<<"\n Caught an integer"<<endl; } catch(char c) { cout<<"\n Caught a character"<<endl; } catch(float q) { cout<<"\n Caught a float"<<endl; } cout<<"End"; return(0); }
