Factorial of a number by using user-defined functions and structures.
Following concepts are used in this program
structure
For example “factorial”.
function definition
For example;
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void print_factorial(factorial f) { cout<<"Display result"<<endl; cout<<"factorial of a number"<<f.num<<" "<<"is="<<f.fac; } |
function declaration
For example; “void print_factorial( factorial );”.
function Calling
For example;
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print_factorial( f); |
for loop
For example;
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for(int i=1;i<=f.num;i++) |
Source code of structures and user define functions of Factorial of a number
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//Factorial of a number user define #include<iostream> using namespace std; struct factorial { int fac=1,num; }; void print_factorial( factorial ); int main() { factorial f; cout<<"Enter a number:"; cin>>f.num; for(int i=1;i<=f.num;i++) { f.fac=f.fac*i; } print_factorial( f); return 0; } void print_factorial(factorial f) { cout<<"Display result"<<endl; cout<<"factorial of a number"<<f.num<<" "<<"is="<<f.fac; } |