pointer « fwrite « C File Q&A

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C File Q&A » fwrite » pointer

1. rewind(file pointer) and then fwrite. Won't fwrite overwrite the file contents? C stackoverflow.com

I came acroos this somewhere. A file is being written and then rewind(fileptr) is done and then what should be written to the beginning of the file is written. But writing at ...

2. How to fwrite a char array pointer? cboard.cprogramming.com

FILE * pFile; long lSize; char buffer[1065]; memset(buffer,0x0,sizeof(buffer)); size_t result; pFile = fopen ( "./Records.bin" , "rb" ); // obtain file size: fseek (pFile , 0 , SEEK_END); lSize = ftell (pFile); rewind (pFile); // copy the file into the buffer: result = fread (buffer,1,lSize,pFile); /* the whole file is now loaded in the memory buffer. */

3. error C2172: 'fwrite' : actual parameter is not a pointer : parameter 1??? cboard.cprogramming.com

Code: void saveEmployeeDataByBinary(struct EmployeeData *emp) { FILE *file; char choice; char fileName[100]; struct EmployeeData *head = emp; int i; if(emp == NULL)//If list is empty { printf("\n\tNo Employee Have been added!\n\n\t"); return; } while(emp != NULL){ //Check if all data are computed if (emp->dataElement->weeklyPay == 0){ printf("\n\tOne or more of the employee pay have not been computed, \n\tplease compute before saving.\n\t"); ...

4. Help: fwrite, I want to write forward pointer address in present file pointer daniweb.com

void create_fbeCodeDat() { int checkSum=0; fwrite(&signature,1, 4, bin_fp);//signature=0xabcd0001 fwrite(&version, 1,4,bin_fp);//Version fseek(bin_fp,4,SEEK_CUR); //FBD Program code fseek(bin_fp,2,SEEK_CUR); //not used fwrite(&fbdStepno,1,2,bin_fp); //FBD step No.[N1] fseek(bin_fp,4,SEEK_CUR); //const data offset //Here i have to write the address of next fbdstepno*4+1 bytes //consider fbdstepno=4, here in 4 bytes have to write address of 5th byte address // for ex: next 5th byte adress has to be write ...