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back to boardDiscussion of Problem 1068. Sum
int num,n,i,sum=0;
// read n;
//case 1
if(n>0){
for(i=1;i<=n;i++){
sum=sum+i;
}
printf("%d",sum);
}
//case 2
if(n<0){
for(i=(-1);i>=n;i--){
sum=sum+i;
}
sum=sum+1;
printf("%d",sum);
}
//case 3
else if(n==0){
printf("1");
}
}
when n<0,then sum=sum+1;
why you using sum=sum+1; #include<stdio.h>
int main()
{
int num,n,i,sum=0;
scanf("%d", &n);
if(n>0){
for(i=1;i<=n;i++){
sum=sum+i;
}
printf("%d",sum);
}
if(n<0){
for(i=n;i<=1;i++){
sum=sum+i;
}
printf("%d",sum);
}
else if(n==0){
printf("1");
}
} |
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