#include <stdio.h>
int sum;
void calculate(int(*a)[4]);
int main(void) {
int a[3][4]={{1,2,3,4},{5,6,7,8},{9,10,11,12}};
calculate(a);
return 0;
}
void calculate(int(*a)[4]){
int i,j;
for(i=0;i<=2;i++){
for(j=0;j<=3;j++){
sum=sum+*(a[i]+j);
}
}
}
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