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main() { /* longueur */ float absA,absB,ordA,ordB,x,y; float longueur; scanf("%f%f%f%f",&absA,&absB,&ordA,&ordB); x = (absA - absB)*(absA - absB); y = (ordA - ordB)*(ordA - ordB); longueur = sqrt(x+y); printf("%f\n",longueur); }à propos des points suivants :
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