#include <stdio.h>
#include <stdlib.h>

int myRand(void) {
  return rand() * (RAND_MAX + 1) + rand();
}

int randDansIntervalle1(int bi, int bf) {
  return bi + rand() % (bf - bi + 1);
}

int randDansIntervalle2(int bi, int bf) {
  return bi + myRand() % (bf - bi + 1);
}

int randDansIntervalle(int bi, int bf, int (*fonctionRand)(void)) {
  return bi + fonctionRand() % (bf - bi + 1);
}

double rand01(void) {
  return ((double) myRand() / (RAND_MAX + 1)) / (RAND_MAX + 1);
}

void tester1(int n) {
  int n5 = 0;
  int n6 = 0;
  int n7 = 0;
  int n8 = 0;
  int n9 = 0;
  int n10 = 0;
  for (int i = 0; i < n; i++) {
    int v = randDansIntervalle1(5, 10);
    switch (v) {
      case 5: {
        n5++;
      }
      break;
      case 6: {
        n6++;
      }
      break;
      case 7: {
        n7++;
      }
      break;
      case 8: {
        n8++;
      }
      break;
      case 9: {
        n9++;
      }
      break;
      case 10: {
        n10++;
      }
      break;
    }
  }
  printf("%7d %7d %7d %7d %7d %7d : %7d\n", n5, n6, n7, n8, n9, n10,
         n5 + n6 + n7 + n8 + n9 + n10);
  printf("%7.3lf %7.3lf %7.3lf %7.3lf %7.3lf %7.3lf\n",
         (double) n5 / n * 100.0,
         (double) n6 / n * 100.0,
         (double) n7 / n * 100.0,
         (double) n8 / n * 100.0,
         (double) n9 / n * 100.0,
         (double) n10 / n * 100.0);
}

void tester2(int n) {
  int n0 = 0;
  int n1 = 0;
  int n2 = 0;
  for (int i = 0; i < n; i++) {
    int v = randDansIntervalle1(0, 29999);
    if ((v >= 0) && (v <= 9999)) {
      n0++;
    }
    if ((v >= 10000) && (v <= 19999)) {
      n1++;
    }
    if ((v >= 20000) && (v <= 29999)) {
      n2++;
    }
  }
  printf("%7d %7d %7d %23s : %7d\n", n0, n1, n2, "", n0 + n1 + n2);
  printf("%7.3lf %7.3lf %7.3lf\n",
         (double) n0 / n * 100.0,
         (double) n1 / n * 100.0,
         (double) n2 / n * 100.0);
}

void tester3(int n) {
  int n0 = 0;
  int n1 = 0;
  int n2 = 0;
  for (int i = 0; i < n; i++) {
    int v = randDansIntervalle2(0, 29999);
    if ((v >= 0) && (v <= 9999)) {
      n0++;
    }
    if ((v >= 10000) && (v <= 19999)) {
      n1++;
    }
    if ((v >= 20000) && (v <= 29999)) {
      n2++;
    }
  }
  printf("%7d %7d %7d %23s : %7d\n", n0, n1, n2, "", n0 + n1 + n2);
  printf("%7.3lf %7.3lf %7.3lf\n",
         (double) n0 / n * 100.0,
         (double) n1 / n * 100.0,
         (double) n2 / n * 100.0);
}

void tester4(int n) {
  int n0 = 0;
  int n1 = 0;
  int n2 = 0;
  int n3 = 0;
  for (int i = 0; i < n; i++) {
    double v = rand01();
    if ((v >= 0) && (v < 0.25)) {
      n0++;
    }
    if ((v >= 0.25) && (v < 0.5)) {
      n1++;
    }
    if ((v >= 0.5) && (v < 0.75)) {
      n2++;
    }
    if ((v >= 0.75) && (v < 1.0)) {
      n3++;
    }
  }
  printf("%7d %7d %7d %7d %15s : %7d\n", n0, n1, n2, n3, "", n0 + n1 + n2 + n3);
  printf("%7.3lf %7.3lf %7.3lf %7.3lf\n",
         (double) n0 / n * 100.0,
         (double) n1 / n * 100.0,
         (double) n2 / n * 100.0,
         (double) n3 / n * 100.0);
}

int main(void) {
  srand(7);
  tester1(6000000);
  printf("\n");
  tester2(3000000);
  printf("\n");
  tester3(3000000);
  printf("\n");
  tester4(4000000);
  return 0;
}