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Full Discussion: Unclear pointer and array
Top Forums Programming Unclear pointer and array Post 302884201 by Akshay Hegde on Saturday 18th of January 2014 09:46:58 AM
Old 01-18-2014
Hi yifangt try this simplified version

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

char *substring(size_t start, size_t stop, const char *src)
{
    
    unsigned int count = stop - start;
    char *dst=malloc(stop+1);
    sprintf(dst, "%.*s", count, src + start);
    return dst;
}

int main(int argc, char **argv)
{
    if (argc != 4) {
    printf("Error! Usage:\n\t \
            argv[0]=program;\n\t \
            argv[1]=input string\n\t \
            argv[2]=start_position of string\n\t \
            argv[3]=end_postion of string\n");

    return 1;
    }

    printf("%s\n",substring(atoi(argv[2]), atoi(argv[3]), argv[1]));
    return 0;
}

This User Gave Thanks to Akshay Hegde For This Post:
 

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PGACreate(8)							      PGAPack							      PGACreate(8)

NAME
PGACreate - creates an uninitialized context variable. The Fortran version of this function call contains only the last three arguments INPUT PARAMETERS
argc - address of the count of the number of command line arguments. argv - array of command line arguments. datatype - the data type used for the strings. Must be one of PGA_DATATYPE_BINARY, PGA_DATATYPE_CHARACTER, PGA_DATATYPE_INTEGER, PGA_DATATYPE_REAL, or PGA_DATATYPE_USER binary -valued, character-valued, integer-valued, real -valued, or a user-defined datatype, respectively. len - the string length (number of genes). maxormin - the direction of optimization. Must be one of PGA_MAXIMIZE or PGA_MINIMIZE for maximization or minimization, respectively. OUTPUT PARAMETERS
none SYNOPSIS
#include "pgapack.h" PGAContext * PGACreate(argc, argv, datatype, len, maxormin) int *argc char **argv int datatype int len int maxormin LOCATION
create.c EXAMPLE
Example: In C: void main(int argc, char **argv) { PGAContext *ctx; : ctx = PGACreate(&argc, argv, PGA_DATATYPE_BINARY, 100, PGA_MAXIMIZE); : // Set options here : PGASetUp(ctx); : // Run the GA here : PGADestroy(ctx); } In FORTRAN: integer ctx : ctx = PGACreate(PGA_DATATYPE_BINARY, 100, PGA_MAXIMIZE) : c Set options here : call PGASetUp(ctx) : c Run the GA here : call PGADestroy(ctx) stop end 05/01/95 PGACreate(8)
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