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#include <stdio.h>
#include <math.h>
int main()
{
float a, b, c, S, p;
printf("Please enter a:");
scanf("%d", &a);
printf("Please enter b:");
scanf("%d", &b);
printf("Please enter c:");
scanf("%d", &c);
p = (a+b+c)/2;
S = sqrt(p*(p-a)*(p-b)*(p-c));
printf("The area of triangle: %d", &S);
return 0;
}
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