maino f int i, n, k, sum 1=1: sum=0 printf("Input n scanf(%d",&n) while(i=n) i scanf("%",&k); sum=sum+k printf("sum is: % n",sum) 运行结果: nput n: 6 123421195 Sum Ismain() { int i, n, k, sum; i=1; sum=0; printf("Input n: "); scanf("%d", &n); while(i<=n) { scanf("%d", &k); sum=sum+k; i++; } printf("\nsum is: %d\n", sum); } 运行结果： Input n: 6 12 34 2 11 9 5 sum is: 73