C Program to Calculate Compound Amount

Formula to find the compound amount

Where, 

P = principle

R = rate

T = time

 C program to print compound amount

Here in the program, 

Value of principle is store in variable p

Value of rate is store in variable r

Value of time is store in variable t

#include<stdio.h> #include<conio.h> #include<math.h> void main() {           float p, r, t, ca, a, b, c;            // taking value of principle, rate and interest from the user           printf("\n Enter the value of principle, rate and time");           scanf("%f%f%f", &p, &r, &t);           a=r/100; //performing rate/100           b=1+a; // performing (1+r/100)           c=pow(b,t); // performing (1+r/100)t           ca=p*c; // performing p*(1+r/100)t           printf("\n Compound Amount is %f", ca);           getch(); }

Output

C program to calculate compound amount without using pow()

#include<stdio.h> #include<conio.h> void main() {           float p, t, r, i, z=1, ca, a, b;           // taking input from the user           printf("\n Enter the value of principle, rate and time");           scanf("%f%f%f", &p, &t, &r);           a = r/100; // performing r/100           b = (1+a); // performing (1+r/100)           for(i=1;i<=t;i++)           {                    // to perform (1+r/100)                    z=z*b; // b is varible where value of (1+r/100) stored           }           ca = p*z; // value of (1+r/100) store in z           printf("\n Compound Amount is %f", ca);           getch(); }

Output

C program to calculate compound amount using function

#include<stdio.h> #include<conio.h> #include<math.h> void ci(float,float,float); // function prototype int main() {           float p, r, t;           // taking value of principle, rate and interest from the user           printf("\n Enter the value of principle, rate and time");           scanf("%f%f%f", &p, &r, &t);           ci(p,r,t); // function call           getch(); } void ci(float p, float r, float t) {           float a, b, c, ca;           a=r/100; //performing rate/100           b=1+a; // performing (1+r/100)           c=pow(b,t); // performing (1+r/100)t           ca=p*c; // performing p*(1+r/100)t           printf("\n Compound Amount is %f", ca);           getch(); }

Output