Sum of positive values in an array gives negative result in a c program

Question

I have a problem that is, when I sum the values of an array (that are all positive, I verified by printing the values of the array), I end up with a negative value. My code for

Answer 1

I think your final output is going out of range. For this you will have to declare summcp as long long int

long long int summcp = 0;
for (k = 0; k < SIMUL; k++)
{
    summcp += mcp[k];
}
printf("summcp: %lld.\n", summcp);

int variable throws garbage value if its range is exceeded.