C language-100 addition and subtraction, C language-100 summation

C language-100 addition and subtraction, C language-100 summation

---------------------------- Du Niang idea ------------------------------------------------------

Action ()

{// Implement 1-2 + 3-4 + 5 ...... + 99-100 Value

// 20160802

Int I, tag, sum;

Sum = 0;

Tag = 1;

For (I = 1; I <= 100; I ++ ){

Sum + = I * tag;

Tag =-tag;

}

Lr_output_message ("% d \ n", sum );

}

--------------------------- Division: You want -----------------------------------------------------

Action (){

// Implement 1-2 + 3-4 + 5 ...... + 99-100 Value

Int odd [50];

Int even [50];

Int sum_n;

Int i1, i2;

Int m = 0, n = 0;

Int sum;

For (i1 = 1; i1 <100; i1 ++ ){

Odd [m] = i1;

M ++;

I1 ++;

}

For (i2 =-2; i2 >=- 100; i2 --){

Even [n] = i2;

N ++;

I2 --;

}

For (sum_n = 0; sum_n <50; sum_n ++ ){

Sum + = odd [sum_n] + even [sum_n];

}

Lr_output_message ("sum = % d", sum );

Return 0;

}