不终止的程序

Question

I wrote a program that should take an array of numbers and find the array index of the smallest number. However, when I type the numbers with spaces between and then press enter, the program keeps running. What can be the cause? Here is the code:

#include<stdio.h>

//read numbers to an array
//find minimum
//print the index of minimum

double findMinimum(int size,double array[]){
int n;
int minIndex=0;
for(n=1;n<size;size++){
    if(array[n]<array[n-1]){
        minIndex=n;
    }
 }
 return minIndex;
}

int main(){
setvbuf(stdout,NULL,_IONBF,0);

int size=0;
double inArray[size];

printf("Enter an array of numbers:");

int k=0;
char c;

while(c!='\n'){
  c=getchar();

  if(c=='\n'){
      break;
  }

  scanf("%lf",&inArray[k]);
  k++;
  size++;

  };

 int minIndex=0;
 minIndex=findMinimum(size,inArray);
 printf("The index of minimum number is %i",minIndex);

 return 0;
 }

I also took the part of the code that scans numbers to an array. I tried to change the while loop and used "break" statement, but the output gave all numbers in an array except the first one. Here is the code:

#include<stdio.h>

//read numbers to an array

int main(){
setvbuf(stdout,NULL,_IONBF,0);

int size=0;
double inArray[size];

printf("Enter an array of numbers ending with question mark:\n");

int k=0;
char c;

while(1){
  c=getchar();

  if(c=='?'){
      break;
  }

  scanf("%lf",&inArray[k]);
  k++;
  size++;
};

int n;
for(n=0;n<size;n++){
    printf("%f\n",inArray[n]);
}

return 0;
}

Thanks for help in advance!

Answer 1

for(n=1;n<size;size++){
    if(array[n]<array[n-1]){
        minIndex=n;
    }
 }

The issue in your code is you are incrementing size , thats why your loop is not terminating. increment n

Edit

you have initialized your 'n' with 1 , however arrays start with zero index thats why it misses the first element,

for(n=0;n<size;n++){
    if(array[n]<array[minIndex]){
        minIndex=n;
    }
 }

Answer 2

try this one :

for(n=1; n < size; n++){
    if(array[n]<array[minIndex]){
        minIndex=n;
    }
}