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  1. #include <stdio.h>
  2.  
  3. int sum1(int n){
  4. int i, sum=0;
  5. for(i=1; i<=n; i++){
  6. sum=sum+i;
  7. }
  8. return sum;
  9. }
  10. int main(void) {
  11. int n;
  12. for(n=1; n<=10; n++){
  13. sum1(n);
  14. printf("sum1(%d)=%d\n", n, sum1(n));
  15. }
  16. return 0;
  17. }
  18.  
Success #stdin #stdout 0s 5312KB
stdin
Standard input is empty
stdout
sum1(1)=1
sum1(2)=3
sum1(3)=6
sum1(4)=10
sum1(5)=15
sum1(6)=21
sum1(7)=28
sum1(8)=36
sum1(9)=45
sum1(10)=55