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#include <stdio.h>
#define MAX 10
 
int* getIntegers() {
  int a[MAX];
  int i = 0;
  while (i < MAX) {
    int n;
    printf("Insert an integer: ");
    scanf("%d", &n);
    a[i] = n;
    i++;
  }
  int *p = a;
  return p;
}
 
int findMax(int *s) {
  int max = -1000000;
  for (int i = 0; i < MAX; i++) {
    if (s[i] > max) {
      max = s[i];
    }
  }
  return max;
}
 
int main() {
  int *p = getTenIntegers();
  int max = findMax(p);
  printf("Max value: %d\n", max);
  return 0;
}

prog.c: In function ‘main’:
prog.c:29:12: warning: implicit declaration of function ‘getTenIntegers’ [-Wimplicit-function-declaration]
   int *p = getTenIntegers();
            ^~~~~~~~~~~~~~
prog.c:29:12: warning: initialization makes pointer from integer without a cast [-Wint-conversion]
prog.c: In function ‘getIntegers’:
prog.c:15:10: warning: function returns address of local variable [-Wreturn-local-addr]
   return p;
          ^
prog.c:5:7: note: declared here
   int a[MAX];
       ^
/home/sUZKlk/cc7yNMqM.o: In function `main':
prog.c:(.text.startup+0x7): undefined reference to `getTenIntegers'
collect2: error: ld returned 1 exit status

Standard output is empty