array problem

[kiki_lala]

void voltage_measure(void) {
      
   unsigned char Van1[8];
   unsigned char Vbn[8];
   unsigned char Vcn[8];
   unsigned char AB[8];
   unsigned char AC[8];    
  // unsigned int Vab1[8],Vab2[8],Vac1[8],Vac2[8],Vbc1[8],Vbc2[8];
 //  unsigned int Vab[8],Vac[8],Vbc[8];
  // unsigned int i,j; 
   
   Van1[0]=0xF0;   
   Van1[1]=0x00;
   Van1[2]=0x00;                                  
   Van1[3]=0x00;
   Van1[4]=0x00;  
   
   Vbn[0]=0x78;
   Vbn[1]=0x00;
   Vbn[2]=0x00;
   Vbn[3]=0x00;
   Vbn[4]=0x00;
   
   Vcn[0]=0x3C;
   Vcn[1]=0x00;
   Vcn[2]=0x00;
   Vcn[3]=0x00;
   Vcn[4]=0x00;
   
   AB[0]=0x32;
   AB[1]=0x00;
   
   AC[0]=0x2D;
   AC[1]=0x00;
    
  
 /*
   for( i=0;i<4;i++) {
   for(j=0;j<1;j++) {
    
   Vab1[i]=((Vbn[i]*sin(AB[j]))*(Vbn*sin(AB[j])));
   Vab2[i]=(Van1[i]+(Vbn[i]*cos(AB[i])))*(Van1[i]+(Vbn[i]*cos(AB[i])));
   Vab[i]=sqrt(Vab1+Vab2); 
   
   
   Vac1[i]=(Vcn[i]*sin(AC[i]))*(Vcn[i]*sin(AC[i]));
   Vac2[i]=(Van1[i]+(Vcn[i]*cos(AC[i])))*(Van1[i]+Vcn[i]*cos(AC[i]));
   Vac[i]=sqrt(Vac1[i]+Vac2[i]);
   
   Vbc1[i]=(Vcn*sin(BC))*(Vcn*sin(BC));
   Vbc2[i]=(Vbn[i]+(Vcn[i]*cos(BC[j])))*(Vbn[i]+(Vcn[i]*cos(BC[j]))) ;
   Vbc[i]=sqrt(Vbc1[i]+Vbc2[i]);
   
  
   
   }  
   }
    */
   }/co

actually i have a problem how to put array character into the formula...the array with 8 bytes ,what i'm supposed to do to make sure the character get into the formula

[Tux0r]

void voltage_measure(void) {
      
   unsigned char Van1[8];
   unsigned char Vbn[8];
   unsigned char Vcn[8];
   unsigned char AB[8];
   unsigned char AC[8];    
  // unsigned int Vab1[8],Vab2[8],Vac1[8],Vac2[8],Vbc1[8],Vbc2[8];
 //  unsigned int Vab[8],Vac[8],Vbc[8];
  // unsigned int i,j; 
   
   Van1[0]=0xF0;   
   Van1[1]=0x00;
   Van1[2]=0x00;                                  
   Van1[3]=0x00;
   Van1[4]=0x00;  
   
   Vbn[0]=0x78;
   Vbn[1]=0x00;
   Vbn[2]=0x00;
   Vbn[3]=0x00;
   Vbn[4]=0x00;
   
   Vcn[0]=0x3C;
   Vcn[1]=0x00;
   Vcn[2]=0x00;
   Vcn[3]=0x00;
   Vcn[4]=0x00;
   
   AB[0]=0x32;
   AB[1]=0x00;
   
   AC[0]=0x2D;
   AC[1]=0x00;
    
  
 /*
   for( i=0;i<4;i++) {
   for(j=0;j<1;j++) {
    
   Vab1[i]=((Vbn[i]*sin(AB[j]))*(Vbn*sin(AB[j])));
   Vab2[i]=(Van1[i]+(Vbn[i]*cos(AB[i])))*(Van1[i]+(Vbn[i]*cos(AB[i])));
   Vab[i]=sqrt(Vab1+Vab2); 
   
   
   Vac1[i]=(Vcn[i]*sin(AC[i]))*(Vcn[i]*sin(AC[i]));
   Vac2[i]=(Van1[i]+(Vcn[i]*cos(AC[i])))*(Van1[i]+Vcn[i]*cos(AC[i]));
   Vac[i]=sqrt(Vac1[i]+Vac2[i]);
   
   Vbc1[i]=(Vcn*sin(BC))*(Vcn*sin(BC));
   Vbc2[i]=(Vbn[i]+(Vcn[i]*cos(BC[j])))*(Vbn[i]+(Vcn[i]*cos(BC[j]))) ;
   Vbc[i]=sqrt(Vbc1[i]+Vbc2[i]);
   
  
   
   }  
   }
    */
   }/co

how to put an array into the formula

Sorry, but you are going to have to be more specific.

[BEN10]

If I understood your question correctly, what you've done in the commented part is perfectly fine, I mean you can use array elements as arguments to trigonometrical functions. But please be more specific next time.