Hi everyone! last night i got a headache just because of this error "Conflicting Types". I try to play around with my code in hope that it gonna fix the problem, but seem useless. Here is my program:

I got error "coflicting types for 'calcavg', and conflicting types for 'outresults' "Code:/******************************************************************************/ /******** This program is combines from Project #2 thru #5 to find the *******/ /********** values that multiples of 7 or actually contain a digit 7 **********/ /******************************************************************************/ #include <stdio.h> #include <stdlib.h> #define MSIZE 500 #define DSIZE 500 int main() { int mul7[MSIZE]; //array multiples by 7 int dig7[DSIZE]; //array contain a digit 7 int n; //number int sr; //starting range int er; //engding range int c7; //values that multiples by 7 int d7; //values that contain a digit 7 double mavg; //average of values multiples by 7 double davg; //average of values contain a digit 7 printf("Enter start and end range values: "); while((n = scanf ("%i %i", &sr, &er)) == 2) { if (sr < 0 || er > 999 || sr > er) printf("Range value out of range\n"); else { c7 = fmul7(sr, er, mul7, MSIZE); d7 = fdig7(sr, er, dig7, DSIZE); mavg = calcavg(mul7, c7); davg = calcavg(dig7, d7); outresults(sr, er, mul7, MSIZE, dig7, DSIZE, c7, d7, mavg, davg); printf("Enter start and end rage values: "); } } if (n != EOF) printf("Input error occurred in scanf\n"); system("PAUSE"); return 0; } /******************************************************************************/ /***** This little subprogram is about finding the values multiples by 7 ******/ /******************************************************************************/ int fmul7(int str, int endr, int mul7[], int m7size) { int ndx; //index number int rem; //remain number int i; //count number i = 0; for (ndx = str; ndx <= endr; ndx++) { rem = ndx % 7; if (rem == 0) { mul7[m7size] = ndx; i = i + 1; } } return 0; } /******************************************************************************/ /**** this little subprogram is about finding the values contain a digit 7 ****/ /******************************************************************************/ int fdig7(int str, int endr, int dig7[], int d7size) { int q1; //first digit int q2; //second digit int q3; //third digit int rem1; //remainder int num; //number int c7; //count number c7 = 0; for(num = str; num <= endr; num++) { q1 = num / 100; rem1 = num - (q1 * 100); q2 = rem1 / 10; q3 = rem1 - (q1 * 10); if (q1 == 7 || q2 == 7 || q3 == 7) { dig7[d7size] = num; c7++; } } return 0; } /******************************************************************************/ /** This little subprogram is about finding the avarage of all number *********/ /******************************************************************************/ double calcavg(int md7[], int cntmd7) { int ndx; //index number int sum; //total sum double avg; //total avarage sum = 0; avg = 0.0; for (ndx = 0; ndx < cntmd7; ndx++) sum = sum + md7[ndx]; if (cntmd7 == 0) printf("Average divisor is zero - skip division \n"); else avg = (double) sum / ndx; return 0; } /******************************************************************************/ /************ This little subprogram is about output information **************/ /******************************************************************************/ void outresults (int sr, int er, int m7[], int szm7, int d7[], int szd7, int cm7, int cd7, double mav, double dav) { int i; printf("Start Range = %i End Range = %i\n", sr, er); printf("Multiple of 7 count is: %i\n", cm7); printf("Number having digit 7 count is: %i\n", cd7); printf("Multiple of 7 values are: \n"); for (i = 0; i < cm7; i++) printf("%i\n", m7[i]); printf("Values having digit 7 are: \n"); for (i = 0; i < cd7; i++) printf("%i\n", d7[i]); printf("Multiple of 7 average is: %0.2lf\n", mav); printf("Values having digit 7 average is: %0.2lf\n", dav); }

i'm having a hard time doing subprogram. I have tried to look at the C tutorial in this home website, but seem like the tutorials didn't cover the subprogram! so, i'm really not sure if i did this program right or not! hope somebody can help me out!