#include<stdio.h>
#include<stdlib.h>

int main()
{
    const float conv_euro[4] = {1, 1.22, 0.81, 108.32};
    float montant, montant_euro, conversion;
	int de, a;
	
	printf("euro <1>, us dollar <2>, livre sterling <3>, yen <4>\n");
    printf("Choisissez la devise : ");
    scanf("%d", &de);
    printf("A convertir en : ");
    scanf("%d", &a);
    printf("Donnez le montant : ");
    scanf("%f", &montant);
    
    montant_euro = montant / conv_euro[de-1];
       
    conversion = montant_euro * conv_euro[a-1];  
       
    printf("Conversion: %.2f\n", conversion);
	
    //system("pause");            //decommente si le terminal se ferme
	return 0;
}