#includeint calc(int *a, int m){ int i = 0; do{ if(a[m--] < 60) ++i; }while(m); return i;}int main(){ int a[20] = { 20, 30, 50, 60, 20, 10, 50, 80, 90, 30, 20, 30, 50, 60, 20, 10, 50, 80, 90, 30 }; printf("the num = %d", calc(a, 20)); return 0;}