How to Calculate Median for Continuous Series in C programming?

Calculate Median for Continuous Series in C programming

// Here, ll = lowerLimit
// cl = classLength
// nc = number of classes
// sf = sum of frequency
// cf = commulative frequency
// f = frequency
#include<stdio.h>
#include<conio.h>
int i,j,ll,up,cl,nc,l[100],u[100],f[100],sf,am,cf[100],temp,x[100];
void continous()
{
            printf("Enter the lower limit: ");
            scanf("%d",&ll);
            printf("Enter the class length: ");
            scanf("%d",&cl);
            printf("Enter the total number of class: ");
            scanf("%d",&nc);
            for(i=0;i<nc;i++)
            {
                        up=ll+cl;
                        l[i]=ll;
                        u[i]=up;
                        ll=up;
                        x[i]=((float)l[i]+(float)u[i])/2;
            }
            for(i=0;i<nc;i++)
            {
                        printf("Enter the frequency for class %d-%d: ",l[i],u[i]);
                        scanf("%d",&f[i]);
            }
            cf[0]=f[0];
            for(i=0;i<nc;i++)
            {
                        cf[i+1]=cf[i]+f[i+1];
            }
            for(i=0;i<nc;i++)
              sf+=f[i];
            for(i=0;i<nc;i++) { if((sf/2) >= cf[i])
                          temp=i+1;
            }
            printf("Class Freq C.F. ");
            i=0;
            for(i=0;i<25;i++)
            printf("-");
            for(i=0;i<nc;i++)
            printf(" %d-%d  %d %d ",l[i],u[i],f[i],cf[i]);
            for(i=0;i<25;i++)
            printf("-");
            printf(" Total %d ",sf);
            printf(" Xl:%d N/2:%.2f F<:%d f:%d c:%d",l[temp],((float)sf/(float)2),cf[temp-1],f[temp],cl);
            printf(" The median is: %.4f",l[temp]+(((((float)sf/(float)2) - cf[temp-1] )/f[temp])*cl));
}
void main()
{
            clrscr();
            continous();
            getch();
}

Output: