This is my problem my knapsack code is given below and I am not getting the expected output it should give me the maximum profit that I could have gained from the inputted elements

# include <stdio.h>

void knapsack(int n, float weight[], float profit[], float capacity){
    float x[20], tp=0;
    int i, j, u;
    u = capacity;

    for (int i = 0; i < n; i++)
        x[i] = 0.0;

    for (int i = 0; i < n; i++)
    {
        if (weight[i]>u)
            break;
        else
        {
            x[i] = 1.0;
            tp = tp + profit[i];
            u = u-weight[i];
        }
    }
        if (i<n)
            x[i] = u/weight[i];

        tp = tp + (x[i] * profit[i]);

        printf("nThe result vector is:-");
        for (int i = 0; i < n; i++)
            printf("%ft", x[i]);

        printf("nMaximum profit is:-%f",tp);
    }
int main(){
    float weight[20], profit[20], capacity;
    int num, i, j;
    float ratio[20], temp;

    printf("nEnter the no. of items:-");
    scanf("%d",&num);

    printf("nEnter the weights and profits of each item:-");
    for (int i = 0; i < num; i++)
    {
        scanf("%f %f",&weight[i], &profit[i]);
    }

    printf("nEnter the capacity of knapsack:-");
    scanf("%f",&capacity);

    for (int i = 0; i < num; i++)
    {
        ratio[i] = profit[i] / weight[i];
    }

    for (int i = 0; i < num; i++)
    {
        for (int j = i+1; j < num; j++)
        {
            if (ratio[i] < ratio[j])
            {
                temp = ratio[j];
                ratio[j] = ratio[i];
                ratio[i] = temp;

                temp = weight[j];
                weight[j] = weight[i];
                weight[i] = temp;

                temp = profit[j];
                profit[j] = profit[i];
                profit[i] = temp;
            }

        }

    }

    knapsack(num, weight, profit, capacity);
    return 0;
}

input tried:                                                                                      Enter the no. of items:-5

Enter the weights and profits of each item:-50 120
50 110
50 130
50 160
40 150

Enter the capacity of knapsack:-70                                                                           output expected:The result vector is:- 1.000000 0.400000        0.000000        0.000000        0.000000
Maximum profit is:- 214.000000

output I am getting: “Enter the weights and profits of each item:-50 120
50 110
50 130
50 160
40 150

Enter the capacity of knapsack:-70″ this is the whole input after giving this input nothing is showing as output