Bank Project in C

#include <stdio.h> #include <stdlib.h> #include <string.h> #define MAXDESC 30 struct operation { double sum; char desc[MAXDESC]; }; int main(void) { int n; struct operation * ops; /* allocation for 3 operations */ ops = malloc(sizeof(struct operation) * 3); if (ops == NULL) return 1; /* we create operations */ ops[0].sum = 500.0; strncpy(ops[0].desc, "Initial deposit", MAXDESC); ops[1].sum = -12.50; strncpy(ops[1].desc, "Purchase of stuff", MAXDESC); ops[2].sum = -375.0; strncpy(ops[2].desc, "TIP Public Treasury", MAXDESC); /* we list our 3 operations */ for (n = 0; n < 3; n++) printf("| %-*s | %7.2f |\n", MAXDESC, ops[n].desc, ops[n].sum); /* we increase the capacity to 4 and add an operation */ struct operation * more_ops; more_ops = realloc(ops, sizeof(struct operation) * 4); if (more_ops == NULL) return 1; ops = more_ops; ops[3].sum = -40.0; strncpy(ops[3].desc, "Gasoline", MAXDESC); /* memory release */ free(ops); return 0; }