Dev Skill DCP-196: Break Simulator Solution

Problem Link
Dev Skill DCP-196: Break Simulator Solution

#include<string.h>
int main()
{
    int T,i;
    float t,u,v,a;
    scanf("%d",&T);
    i=0;
    v=0;
    while(i<T)
    {
        scanf("%f",&u);
        scanf("%f",&t);

        a=(v-u)/t;
        printf("%.2f\n",a);
        i++;
    }
    return 0;
}