pat 1001

#include #include int main(){int a, b, sum;char ans[30];while(scanf("%d%d", &a, &b) != EOF){memset(ans, 0, sizeof(ans));sum = a + b;if(sum == 0) printf("0\n");else{if(sum < 0){printf("-");sum = -sum;}int count = 0, i = 0;while(sum != 0){ans[i++] = sum % 10 + '0';count++;sum = sum / 10;if(count == 3){if(sum != 0)ans[i++] = ',';count = 0;}}for(int l = 0, h = i - 1; l <= h; l++, h--){char tmp = ans[h];ans[h] = ans[l];ans[l] = tmp;}printf("%s\n", ans);}}return 0;}