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POUnknown error on C++, error: expected primary expression before ';' token
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  1. POUnknown error on C++, error: expected primary expression before ';' token
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    copied!<p>Unknown error on C++, error: expected primary expression before ';' token. Here is the code I wrote in C++:</p> <pre><code> #include &lt;iostream&gt; #include &lt;math.h&gt; #include &lt;stdio.h&gt; #define G 6.674E-11 using namespace std; int main() { //Ms = Mass of sun, Me = Mass of Earth, Fg = Gravitational force between them, As = Acceleration of Sun, Ae = Acceleration of Earth, Ve_x // = initial velocity of Earth in x direction, Ve_y = initial velocity of Earth in y direction, Vs_x = initial velocity of the Sun in x direction // Vs_y = initial velocity of sun in y direction, t = time, F = Gravitational force ` between the two bodies. float Ms, Me, Fg, As, Ae, Ve_x, Ve_y, Vs_x, Vs_y, pos_E, pos_S, r_x, r_y, r, t; float S_dist; float E_dist; float F; float Ve[2]; float Vs[2]; float pe[2]; float ps[2]; FILE *fileptr; cout &lt;&lt;"Enter mass of the Sun in kg\n"; cin &gt;&gt; Ms; cout &lt;&lt;"Enter mass of the earth in kg\n"; cin &gt;&gt; Me; cout &lt;&lt;"Enter intial velocity of the sun in x direction in m/s\n"; cin &gt;&gt; Vs[0]; cout &lt;&lt;"Enter intial velocity of the sun in y direction in m/s\n"; cin &gt;&gt; Vs[1]; cout &lt;&lt;"Enter intial velocity of the earth in x direction in m/s\n"; cin &gt;&gt; Ve[0]; cout &lt;&lt;"Enter intial velocity of the earth in y direction in m/s\n"; cin &gt;&gt; Ve[1]; cout &lt;&lt;"Enter intial position of the sun in x component\n"; cin &gt;&gt; ps[0]; cout &lt;&lt;"Enter intial position of the sun in y direction\n"; cin &gt;&gt; ps[1]; cout &lt;&lt;"Enter intial position of the earth in x direction\n"; cin &gt;&gt; pe[0]; cout &lt;&lt;"Enter intial position of the earth in y direction\n"; cin &gt;&gt; pe[1]; for (t=0; t&lt;30000; t+1) { float E_dist; float S_dist; float F; E_dist=sqrt( ((pe[0]-pe[0])*(pe[0]-pe[0])) + ((pe[1]-pe[1])*(pe[1]-pe[1])) ); S_dist=sqrt( ((ps[0]-ps[0])*(ps[0]-ps[0])) + ((ps[1]-ps[1])*(ps[1]-ps[1])) ); r_x=( (pe[0]-pe[0]) - (ps[0]-ps[0]) ); r_y=( (pe[1]-pe[1]) - (ps[1]-ps[1]) ); r= sqrt( (r_x)*(r_x) + (r_y)*(r_y) ); F=(G*Me*Ms)/(r*r); Ae = F/Me; As = F/Ms; Ve_x = Ve[0]; Ve_y = Ve[1]; Vs_x = Vs[0]; Vs_y = Vs[1]; } cout&lt;&lt;"At time "&lt;&lt;t&lt;&lt;":\n The position of the Sun is "&lt;&lt;S_dist&lt;&lt;"\n The position of the Earth is "&lt;&lt;E_dist &lt;&lt;"\n The acceleration of the Sun is "&lt;&lt;As&lt;&lt;" \n The acceleration of the Earth is "&lt;&lt;Ae&lt;&lt;" \nThe velocity of the Sun in the x direction is " &lt;&lt;Vs_x&lt;&lt;" \n The velocity of the Sun in the y direction is "&lt;&lt;Vs_y&lt;&lt;" \n The velocity of the Earth in the x direction is "&lt;&lt;Ve_x&lt;&lt; " \n The velocity of the Earth in the y direction is "&lt;&lt;Ve_y&lt;&lt;" \n The gravitational force between the Sun and the Earth is "&lt;&lt;F&lt;&lt;; // ERROR OCCURRED HERE. } </code></pre> <p>Would be grateful for any help, thanks.</p>
 

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