upper_sub_string

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <ctype.h>
#define NMAX 1000
#define SSMAX 30

uint32_t upper_sub_string(char *str, const char *substr) {
  uint32_t cnt = 0;
  const int lenSS = strlen(substr);
  char *p = strstr(str, substr);
  while (p != NULL) {
    for (int i = 0; i < lenSS; i++) {
      *(p + i) = toupper(*(p + i));
    }
    cnt++;
    p = strstr(p + 1, substr);
  }
  return cnt;
}

int main(void) {
  char s1[NMAX], s2[SSMAX];
  fgets(s1, NMAX, stdin);
  fgets(s2, SSMAX, stdin);
  s2[strlen(s2) - 1] = 0;
  printf("%d\n", upper_sub_string(s1, s2));
  puts(s1);
  return 0;
}