### GIVEN: Coordinates of its end points

Here is the c program to find slope of line

#include<iostream> #include<cmath> using namespace std; #define PI 3.14 int slope(int x1,int y1, int x2,int y2) { float tanx,s; tanx=(y2-y1)/(x2-x1); s=atan(tanx); s=(180/PI)*s; return s; } int main() { float x1,x2,y1,y2,x,tanx,s; while(true) { cout<<"enter the co_ordinate of point A"; cin>>x1>>y1; cout<<"enter the co_ordinate of point B"; cin>>x2>>y2; if(x2-x1==0) { cout<<"Slope is 90 degrees"<<endl; continue; } else s = slope(x1,y1,x2,y2); cout<<"slope of line AB"<<s<<"Degrees"<<endl; } }