Thread: Segmentation Fault -> Main not initializing

This program is compiling just fine but is not running. Even, Main is not initializing,

Here is my code

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int pow2(int n) {
    printf("POW2");
    int pow = 1;    
    while(n <= pow) {        
        if (n < pow) {
            return 0;
        }
        else if(n == pow) {
            return 1;
        }
        else pow = pow * 2;
    }
    return 0;
}

int average(int c[], int len) {
    printf("average");
    int *firstHalf = c;
    int *secondHalf = c + (len/2);
    /*if((len%2) != 0) {    
        int *firstHalf = c;
        int *secondHalf = c + (len/2);
        return (average(firstHalf, (len/2)) + average(secondHalf,(len/2)))/2);
    }*/

    return (average(firstHalf, (len/2))+average(secondHalf,(len/2))/2);
}

/* ********************************************************* MAIN */
int main(int argc, char **argv) { printf ("MAIN"); 
    int c[100];
    int size;    
    int i;    
    int sum;
    float avg;
    i = 0;
    size = 0;
    sum = 0;
    avg = 0;
    
    /* LER OPERAÇÃO */
    printf ("antes while");
    char currentOp[1]; printf ("antes while");
    while(strcmp(argv[i],"\0") != 0) {printf ("durante while");
        i++;
        strcpy(currentOp,argv[i]);        
        if(currentOp[0] == 'a') { /* ADD */
            i++;
            c[size] = atoi(argv[i]);
            size++;
            sum += c[size];
            if(pow2(sum) == 1) {
                avg = average(c,size);
                printf("%.3f\n", avg);
            }
        }
        else if(currentOp[0] == 'r') { /* REMOVE */
            int j;
            int y;
            j = 0;
            y = 0;
            i++;
            int current = atoi(argv[i]);            
            for (j=0; j<size; j++) {                                
                if (c[j] == current) {
                    for(y=j; y<size; y++) {                    
                        c[y] = c[y+1];                        
                    }
                    sum = sum - current;
                    size--;
                }    
            }
            if(pow2(sum) == 1) {
                avg = average(c,size);
                printf("%.3f\n", avg);
            }
        }
        else { /* REPLACE */
            int old;
            int new;
            int k;    
            k = 0;        
            i++;
            old = atoi(argv[i]);
            i++;
            new = atoi(argv[i]);
            if (new != old)    {
                for (k=0; k<size; k++) {                    
                    if(c[k] == old) {
                        c[k] = new;
                        sum = sum - old + new;    
                    }
                }
            }
            if (pow2(sum) == 1) {
                avg = average(c,size);
                printf("%.3f\n", avg);
            }
        }
    }
    return 0;
}

Thanks for your help.

Thank You, you solved my problem