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- #include<stdio.h>
- #include<math.h>
- float AreaDoRetangulo(int a, int b){
- int area;
- if (a>0 && b>0)
- area=a*b;
- else
- area=-1;
- return area;
- }
- int main(){
- int x , y;
- float r;
- x=3;
- y=4;
- r=AreaDoRetangulo(x,y);
- printf("area eh :%f",r);
- return 0;
- }
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