0_0_13090402_14218.cpp: In function 'int main()':
0_0_13090402_14218.cpp:5:21: error: 'scanf' was not declared in this scope
while(scanf("%d",&n)!=EOF)
^
0_0_13090402_14218.cpp:5:24: error: 'EOF' was not declared in this scope
while(scanf("%d",&n)!=EOF)
^
0_0_13090402_14218.cpp:20:22: error: 'printf' was not declared in this scope
printf("%.2f\n",ave);
^
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