#include <stdio.h>
typedef int (*Yunsuan)(int, int);
int sum(int a, int b) { return a + b; }
int minus(int a, int b) { return a - b; //5 } // 10 5 15 int count(int a, int b, Yunsuan p) { return p(a, b); }
int main() { int a = sum(minus(10, 5), count(10, 5, sum)); printf("%d\n", a); return 0;
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