#include<stdio.h> int main() { int A = 0; int B = 0; int C = 0; int D = 0; int E = 0; for (A = 1; A <= 5; A++) { for (B = 1; B <= 5; B++) { for (C = 1; C <= 5; C++) { for (D = 1; D <= 5; D++) { for (E = 1; E <= 5; E++) { if ( ((B == 2) + (A == 3) == 1) && ((B == 2) + (E == 4) == 1) && ((C == 1) + (D == 2) == 1) && ((C == 5) + (D == 3) == 1) && ((A == 4) + (A == 1) == 1) ) { if ((A * B * C * D * E) == 120)//ABCDE只有一个第12345名 { printf("A=%d B=%d C=%d D=%d E=%d\n", A, B, C, D, E); } } } } } } } return 0; }