c++ - How to transform the several loops code of finding combination into recursive method? -

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i trying convert code recursive method

for(int i=0;i<25;++i)   for(int j=i+1;j<25;++j)     for(int k=j+1;k<25;++k)       for(int l=k+1;l<25;++l)         for(int m=l+1;m<25;++m)        {//}

the method finding 25c5 combinations. in recursive way have written this

int soln[5]; void backtrack(int c) { if(c<5) {     for(int i=c;i<25;++i)     {         soln[c] = i;         backtrack(c+1);      } } else { // }

my soln wrong cause number of recursion 6 million actual should 50 thousand. how correct that?

void backtrack(int start, int depth) {   if (depth < 5) {     (int = start; < 25; ++i) {       backtrack(i + 1, depth + 1);     }   } }

seems same nested loops.


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