hi, could someone give me some tips on how can i make the repeat if false has occur.
for example: the program must read in positive integer but if user enter incorrect type data, the computer will ask the user to re-enter number. can someone help me on this? please/
Code:bool ok = false; int num; while(!ok) { while(!(cin >> num)) { cin.clear(); cin.ignore(1000, '\n'); cout << "Enter integer: "; } if(num < 1) { cout << "Enter positive number!"; } else { ok = true; } }
Operating Systems:
- Ubuntu 9.04
- XP
Compiler: gcc
Code:#include <stdio.h> void J(char*a){int f,i=0,c='1';for(;a[i]!='0';++i)if(i==81){ puts(a);return;}for(;c<='9';++c){for(f=0;f<9;++f)if(a[i-i%27+i%9 /3*3+f/3*9+f%3]==c||a[i%9+f*9]==c||a[i-i%9+f]==c)goto e;a[i]=c;J(a);a[i] ='0';e:;}}int main(int c,char**v){int t=0;if(c>1){for(;v[1][ t];++t);if(t==81){J(v[1]);return 0;}}puts("sudoku [0-9]{81}");return 1;}
